<?php
/*
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * GENERATED CODE WARNING
 * Generated by gapic-generator-php from the file
 * https://github.com/googleapis/googleapis/blob/master/google/cloud/compute/v1/compute.proto
 * Updates to the above are reflected here through a refresh process.
 */

namespace Google\Cloud\Compute\V1\Gapic;

use Google\ApiCore\ApiException;
use Google\ApiCore\CredentialsWrapper;
use Google\ApiCore\GapicClientTrait;
use Google\ApiCore\OperationResponse;
use Google\ApiCore\RequestParamsHeaderDescriptor;
use Google\ApiCore\RetrySettings;
use Google\ApiCore\Transport\TransportInterface;
use Google\ApiCore\ValidationException;
use Google\Auth\FetchAuthTokenInterface;
use Google\Cloud\Compute\V1\AbandonInstancesRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\ApplyUpdatesToInstancesRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\CreateInstancesRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\DeleteInstancesRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\DeletePerInstanceConfigsRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\DeleteRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\GetRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\InsertRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\InstanceGroupManager;
use Google\Cloud\Compute\V1\ListErrorsRegionInstanceGroupManagersRequest;
use Google\Cloud\Compute\V1\ListManagedInstancesRegionInstanceGroupManagersRequest;
use Google\Cloud\Compute\V1\ListPerInstanceConfigsRegionInstanceGroupManagersRequest;
use Google\Cloud\Compute\V1\ListRegionInstanceGroupManagersRequest;
use Google\Cloud\Compute\V1\Operation;
use Google\Cloud\Compute\V1\PatchPerInstanceConfigsRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\PatchRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\RecreateInstancesRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagerDeleteInstanceConfigReq;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagerList;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagerPatchInstanceConfigReq;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagerUpdateInstanceConfigReq;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersAbandonInstancesRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersApplyUpdatesRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersCreateInstancesRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersDeleteInstancesRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersListErrorsResponse;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersListInstanceConfigsResp;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersListInstancesResponse;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersRecreateRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersSetTargetPoolsRequest;
use Google\Cloud\Compute\V1\RegionInstanceGroupManagersSetTemplateRequest;
use Google\Cloud\Compute\V1\RegionOperationsClient;
use Google\Cloud\Compute\V1\ResizeRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\SetInstanceTemplateRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\SetTargetPoolsRegionInstanceGroupManagerRequest;
use Google\Cloud\Compute\V1\UpdatePerInstanceConfigsRegionInstanceGroupManagerRequest;

/**
 * Service Description: The RegionInstanceGroupManagers API.
 *
 * This class provides the ability to make remote calls to the backing service through method
 * calls that map to API methods. Sample code to get started:
 *
 * ```
 * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
 * try {
 *     $instanceGroupManager = 'instance_group_manager';
 *     $project = 'project';
 *     $region = 'region';
 *     $regionInstanceGroupManagersAbandonInstancesRequestResource = new RegionInstanceGroupManagersAbandonInstancesRequest();
 *     $operationResponse = $regionInstanceGroupManagersClient->abandonInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersAbandonInstancesRequestResource);
 *     $operationResponse->pollUntilComplete();
 *     if ($operationResponse->operationSucceeded()) {
 *         // if creating/modifying, retrieve the target resource
 *     } else {
 *         $error = $operationResponse->getError();
 *         // handleError($error)
 *     }
 *     // Alternatively:
 *     // start the operation, keep the operation name, and resume later
 *     $operationResponse = $regionInstanceGroupManagersClient->abandonInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersAbandonInstancesRequestResource);
 *     $operationName = $operationResponse->getName();
 *     // ... do other work
 *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'abandonInstances');
 *     while (!$newOperationResponse->isDone()) {
 *         // ... do other work
 *         $newOperationResponse->reload();
 *     }
 *     if ($newOperationResponse->operationSucceeded()) {
 *         // if creating/modifying, retrieve the target resource
 *     } else {
 *         $error = $newOperationResponse->getError();
 *         // handleError($error)
 *     }
 * } finally {
 *     $regionInstanceGroupManagersClient->close();
 * }
 * ```
 */
class RegionInstanceGroupManagersGapicClient
{
    use GapicClientTrait;

    /** The name of the service. */
    const SERVICE_NAME = 'google.cloud.compute.v1.RegionInstanceGroupManagers';

    /** The default address of the service. */
    const SERVICE_ADDRESS = 'compute.googleapis.com';

    /** The default port of the service. */
    const DEFAULT_SERVICE_PORT = 443;

    /** The name of the code generator, to be included in the agent header. */
    const CODEGEN_NAME = 'gapic';

    /** The default scopes required by the service. */
    public static $serviceScopes = [
        'https://www.googleapis.com/auth/compute',
        'https://www.googleapis.com/auth/cloud-platform',
    ];

    private $operationsClient;

    private static function getClientDefaults()
    {
        return [
            'serviceName' => self::SERVICE_NAME,
            'apiEndpoint' => self::SERVICE_ADDRESS . ':' . self::DEFAULT_SERVICE_PORT,
            'clientConfig' => __DIR__ . '/../resources/region_instance_group_managers_client_config.json',
            'descriptorsConfigPath' => __DIR__ . '/../resources/region_instance_group_managers_descriptor_config.php',
            'credentialsConfig' => [
                'defaultScopes' => self::$serviceScopes,
                'useJwtAccessWithScope' => false,
            ],
            'transportConfig' => [
                'rest' => [
                    'restClientConfigPath' => __DIR__ . '/../resources/region_instance_group_managers_rest_client_config.php',
                ],
            ],
            'operationsClientClass' => RegionOperationsClient::class,
        ];
    }

    /** Implements GapicClientTrait::defaultTransport. */
    private static function defaultTransport()
    {
        return 'rest';
    }

    /** Implements GapicClientTrait::getSupportedTransports. */
    private static function getSupportedTransports()
    {
        return [
            'rest',
        ];
    }

    /**
     * Return an RegionOperationsClient object with the same endpoint as $this.
     *
     * @return RegionOperationsClient
     */
    public function getOperationsClient()
    {
        return $this->operationsClient;
    }

    /** Return the default longrunning operation descriptor config. */
    private function getDefaultOperationDescriptor()
    {
        return [
            'additionalArgumentMethods' => [
                'getProject',
                'getRegion',
            ],
            'getOperationMethod' => 'get',
            'cancelOperationMethod' => null,
            'deleteOperationMethod' => 'delete',
            'operationErrorCodeMethod' => 'getHttpErrorStatusCode',
            'operationErrorMessageMethod' => 'getHttpErrorMessage',
            'operationNameMethod' => 'getName',
            'operationStatusMethod' => 'getStatus',
            'operationStatusDoneValue' => \Google\Cloud\Compute\V1\Operation\Status::DONE,
        ];
    }

    /**
     * Resume an existing long running operation that was previously started by a long
     * running API method. If $methodName is not provided, or does not match a long
     * running API method, then the operation can still be resumed, but the
     * OperationResponse object will not deserialize the final response.
     *
     * @param string $operationName The name of the long running operation
     * @param string $methodName    The name of the method used to start the operation
     *
     * @return OperationResponse
     */
    public function resumeOperation($operationName, $methodName = null)
    {
        $options = isset($this->descriptors[$methodName]['longRunning']) ? $this->descriptors[$methodName]['longRunning'] : $this->getDefaultOperationDescriptor();
        $operation = new OperationResponse($operationName, $this->getOperationsClient(), $options);
        $operation->reload();
        return $operation;
    }

    /**
     * Constructor.
     *
     * @param array $options {
     *     Optional. Options for configuring the service API wrapper.
     *
     *     @type string $apiEndpoint
     *           The address of the API remote host. May optionally include the port, formatted
     *           as "<uri>:<port>". Default 'compute.googleapis.com:443'.
     *     @type string|array|FetchAuthTokenInterface|CredentialsWrapper $credentials
     *           The credentials to be used by the client to authorize API calls. This option
     *           accepts either a path to a credentials file, or a decoded credentials file as a
     *           PHP array.
     *           *Advanced usage*: In addition, this option can also accept a pre-constructed
     *           {@see \Google\Auth\FetchAuthTokenInterface} object or
     *           {@see \Google\ApiCore\CredentialsWrapper} object. Note that when one of these
     *           objects are provided, any settings in $credentialsConfig will be ignored.
     *     @type array $credentialsConfig
     *           Options used to configure credentials, including auth token caching, for the
     *           client. For a full list of supporting configuration options, see
     *           {@see \Google\ApiCore\CredentialsWrapper::build()} .
     *     @type bool $disableRetries
     *           Determines whether or not retries defined by the client configuration should be
     *           disabled. Defaults to `false`.
     *     @type string|array $clientConfig
     *           Client method configuration, including retry settings. This option can be either
     *           a path to a JSON file, or a PHP array containing the decoded JSON data. By
     *           default this settings points to the default client config file, which is
     *           provided in the resources folder.
     *     @type string|TransportInterface $transport
     *           The transport used for executing network requests. At the moment, supports only
     *           `rest`. *Advanced usage*: Additionally, it is possible to pass in an already
     *           instantiated {@see \Google\ApiCore\Transport\TransportInterface} object. Note
     *           that when this object is provided, any settings in $transportConfig, and any
     *           $apiEndpoint setting, will be ignored.
     *     @type array $transportConfig
     *           Configuration options that will be used to construct the transport. Options for
     *           each supported transport type should be passed in a key for that transport. For
     *           example:
     *           $transportConfig = [
     *               'rest' => [...],
     *           ];
     *           See the {@see \Google\ApiCore\Transport\RestTransport::build()} method for the
     *           supported options.
     *     @type callable $clientCertSource
     *           A callable which returns the client cert as a string. This can be used to
     *           provide a certificate and private key to the transport layer for mTLS.
     * }
     *
     * @throws ValidationException
     */
    public function __construct(array $options = [])
    {
        $clientOptions = $this->buildClientOptions($options);
        $this->setClientOptions($clientOptions);
        $this->operationsClient = $this->createOperationsClient($clientOptions);
    }

    /**
     * Flags the specified instances to be immediately removed from the managed instance group. Abandoning an instance does not delete the instance, but it does remove the instance from any target pools that are applied by the managed instance group. This method reduces the targetSize of the managed instance group by the number of instances that you abandon. This operation is marked as DONE when the action is scheduled even if the instances have not yet been removed from the group. You must separately verify the status of the abandoning action with the listmanagedinstances method. If the group is part of a backend service that has enabled connection draining, it can take up to 60 seconds after the connection draining duration has elapsed before the VM instance is removed or deleted. You can specify a maximum of 1000 instances with this method per request.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersAbandonInstancesRequestResource = new RegionInstanceGroupManagersAbandonInstancesRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->abandonInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersAbandonInstancesRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->abandonInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersAbandonInstancesRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'abandonInstances');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                             $instanceGroupManager                                       Name of the managed instance group.
     * @param string                                             $project                                                    Project ID for this request.
     * @param string                                             $region                                                     Name of the region scoping this request.
     * @param RegionInstanceGroupManagersAbandonInstancesRequest $regionInstanceGroupManagersAbandonInstancesRequestResource The body resource for this request
     * @param array                                              $optionalArgs                                               {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function abandonInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersAbandonInstancesRequestResource, array $optionalArgs = [])
    {
        $request = new AbandonInstancesRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersAbandonInstancesRequestResource($regionInstanceGroupManagersAbandonInstancesRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('AbandonInstances', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Apply updates to selected instances the managed instance group.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersApplyUpdatesRequestResource = new RegionInstanceGroupManagersApplyUpdatesRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->applyUpdatesToInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersApplyUpdatesRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->applyUpdatesToInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersApplyUpdatesRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'applyUpdatesToInstances');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                         $instanceGroupManager                                   The name of the managed instance group, should conform to RFC1035.
     * @param string                                         $project                                                Project ID for this request.
     * @param string                                         $region                                                 Name of the region scoping this request, should conform to RFC1035.
     * @param RegionInstanceGroupManagersApplyUpdatesRequest $regionInstanceGroupManagersApplyUpdatesRequestResource The body resource for this request
     * @param array                                          $optionalArgs                                           {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function applyUpdatesToInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersApplyUpdatesRequestResource, array $optionalArgs = [])
    {
        $request = new ApplyUpdatesToInstancesRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersApplyUpdatesRequestResource($regionInstanceGroupManagersApplyUpdatesRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('ApplyUpdatesToInstances', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Creates instances with per-instance configurations in this regional managed instance group. Instances are created using the current instance template. The create instances operation is marked DONE if the createInstances request is successful. The underlying actions take additional time. You must separately verify the status of the creating or actions with the listmanagedinstances method.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersCreateInstancesRequestResource = new RegionInstanceGroupManagersCreateInstancesRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->createInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersCreateInstancesRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->createInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersCreateInstancesRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'createInstances');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                            $instanceGroupManager                                      The name of the managed instance group. It should conform to RFC1035.
     * @param string                                            $project                                                   Project ID for this request.
     * @param string                                            $region                                                    The name of the region where the managed instance group is located. It should conform to RFC1035.
     * @param RegionInstanceGroupManagersCreateInstancesRequest $regionInstanceGroupManagersCreateInstancesRequestResource The body resource for this request
     * @param array                                             $optionalArgs                                              {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function createInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersCreateInstancesRequestResource, array $optionalArgs = [])
    {
        $request = new CreateInstancesRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersCreateInstancesRequestResource($regionInstanceGroupManagersCreateInstancesRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('CreateInstances', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Deletes the specified managed instance group and all of the instances in that group.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $operationResponse = $regionInstanceGroupManagersClient->delete($instanceGroupManager, $project, $region);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->delete($instanceGroupManager, $project, $region);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'delete');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager Name of the managed instance group to delete.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function delete($instanceGroupManager, $project, $region, array $optionalArgs = [])
    {
        $request = new DeleteRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('Delete', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Flags the specified instances in the managed instance group to be immediately deleted. The instances are also removed from any target pools of which they were a member. This method reduces the targetSize of the managed instance group by the number of instances that you delete. The deleteInstances operation is marked DONE if the deleteInstances request is successful. The underlying actions take additional time. You must separately verify the status of the deleting action with the listmanagedinstances method. If the group is part of a backend service that has enabled connection draining, it can take up to 60 seconds after the connection draining duration has elapsed before the VM instance is removed or deleted. You can specify a maximum of 1000 instances with this method per request.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersDeleteInstancesRequestResource = new RegionInstanceGroupManagersDeleteInstancesRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->deleteInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersDeleteInstancesRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->deleteInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersDeleteInstancesRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'deleteInstances');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                            $instanceGroupManager                                      Name of the managed instance group.
     * @param string                                            $project                                                   Project ID for this request.
     * @param string                                            $region                                                    Name of the region scoping this request.
     * @param RegionInstanceGroupManagersDeleteInstancesRequest $regionInstanceGroupManagersDeleteInstancesRequestResource The body resource for this request
     * @param array                                             $optionalArgs                                              {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function deleteInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersDeleteInstancesRequestResource, array $optionalArgs = [])
    {
        $request = new DeleteInstancesRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersDeleteInstancesRequestResource($regionInstanceGroupManagersDeleteInstancesRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('DeleteInstances', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Deletes selected per-instance configurations for the managed instance group.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagerDeleteInstanceConfigReqResource = new RegionInstanceGroupManagerDeleteInstanceConfigReq();
     *     $operationResponse = $regionInstanceGroupManagersClient->deletePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerDeleteInstanceConfigReqResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->deletePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerDeleteInstanceConfigReqResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'deletePerInstanceConfigs');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                            $instanceGroupManager                                      The name of the managed instance group. It should conform to RFC1035.
     * @param string                                            $project                                                   Project ID for this request.
     * @param string                                            $region                                                    Name of the region scoping this request, should conform to RFC1035.
     * @param RegionInstanceGroupManagerDeleteInstanceConfigReq $regionInstanceGroupManagerDeleteInstanceConfigReqResource The body resource for this request
     * @param array                                             $optionalArgs                                              {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function deletePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerDeleteInstanceConfigReqResource, array $optionalArgs = [])
    {
        $request = new DeletePerInstanceConfigsRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagerDeleteInstanceConfigReqResource($regionInstanceGroupManagerDeleteInstanceConfigReqResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('DeletePerInstanceConfigs', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Returns all of the details about the specified managed instance group.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $response = $regionInstanceGroupManagersClient->get($instanceGroupManager, $project, $region);
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager Name of the managed instance group to return.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\Cloud\Compute\V1\InstanceGroupManager
     *
     * @throws ApiException if the remote call fails
     */
    public function get($instanceGroupManager, $project, $region, array $optionalArgs = [])
    {
        $request = new GetRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startCall('Get', InstanceGroupManager::class, $optionalArgs, $request)->wait();
    }

    /**
     * Creates a managed instance group using the information that you specify in the request. After the group is created, instances in the group are created using the specified instance template. This operation is marked as DONE when the group is created even if the instances in the group have not yet been created. You must separately verify the status of the individual instances with the listmanagedinstances method. A regional managed instance group can contain up to 2000 instances.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManagerResource = new InstanceGroupManager();
     *     $project = 'project';
     *     $region = 'region';
     *     $operationResponse = $regionInstanceGroupManagersClient->insert($instanceGroupManagerResource, $project, $region);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->insert($instanceGroupManagerResource, $project, $region);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'insert');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param InstanceGroupManager $instanceGroupManagerResource The body resource for this request
     * @param string               $project                      Project ID for this request.
     * @param string               $region                       Name of the region scoping this request.
     * @param array                $optionalArgs                 {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function insert($instanceGroupManagerResource, $project, $region, array $optionalArgs = [])
    {
        $request = new InsertRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManagerResource($instanceGroupManagerResource);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('Insert', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Retrieves the list of managed instance groups that are contained within the specified region.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $project = 'project';
     *     $region = 'region';
     *     // Iterate over pages of elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->list($project, $region);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     *     // Alternatively:
     *     // Iterate through all elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->list($project, $region);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $project      Project ID for this request.
     * @param string $region       Name of the region scoping this request.
     * @param array  $optionalArgs {
     *     Optional.
     *
     *     @type string $filter
     *           A filter expression that filters resources listed in the response. Most Compute resources support two types of filter expressions: expressions that support regular expressions and expressions that follow API improvement proposal AIP-160. If you want to use AIP-160, your expression must specify the field name, an operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The operator must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`. For example, if you are filtering Compute Engine instances, you can exclude instances named `example-instance` by specifying `name != example-instance`. The `:` operator can be used with string fields to match substrings. For non-string fields it is equivalent to the `=` operator. The `:*` comparison can be used to test whether a key has been defined. For example, to find all objects with `owner` label use: ``` labels.owner:* ``` You can also filter nested fields. For example, you could specify `scheduling.automaticRestart = false` to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels. To filter on multiple expressions, provide each separate expression within parentheses. For example: ``` (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake") ``` By default, each expression is an `AND` expression. However, you can include `AND` and `OR` expressions explicitly. For example: ``` (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true) ``` If you want to use a regular expression, use the `eq` (equal) or `ne` (not equal) operator against a single un-parenthesized expression with or without quotes or against multiple parenthesized expressions. Examples: `fieldname eq unquoted literal` `fieldname eq 'single quoted literal'` `fieldname eq "double quoted literal"` `(fieldname1 eq literal) (fieldname2 ne "literal")` The literal value is interpreted as a regular expression using Google RE2 library syntax. The literal value must match the entire field. For example, to filter for instances that do not end with name "instance", you would use `name ne .*instance`.
     *     @type int $maxResults
     *           The maximum number of results per page that should be returned. If the number of available results is larger than `maxResults`, Compute Engine returns a `nextPageToken` that can be used to get the next page of results in subsequent list requests. Acceptable values are `0` to `500`, inclusive. (Default: `500`)
     *     @type string $orderBy
     *           Sorts list results by a certain order. By default, results are returned in alphanumerical order based on the resource name. You can also sort results in descending order based on the creation timestamp using `orderBy="creationTimestamp desc"`. This sorts results based on the `creationTimestamp` field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first. Currently, only sorting by `name` or `creationTimestamp desc` is supported.
     *     @type string $pageToken
     *           A page token is used to specify a page of values to be returned.
     *           If no page token is specified (the default), the first page
     *           of values will be returned. Any page token used here must have
     *           been generated by a previous call to the API.
     *     @type bool $returnPartialSuccess
     *           Opt-in for partial success behavior which provides partial results in case of failure. The default value is false.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function list($project, $region, array $optionalArgs = [])
    {
        $request = new ListRegionInstanceGroupManagersRequest();
        $requestParamHeaders = [];
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['filter'])) {
            $request->setFilter($optionalArgs['filter']);
        }

        if (isset($optionalArgs['maxResults'])) {
            $request->setMaxResults($optionalArgs['maxResults']);
        }

        if (isset($optionalArgs['orderBy'])) {
            $request->setOrderBy($optionalArgs['orderBy']);
        }

        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        if (isset($optionalArgs['returnPartialSuccess'])) {
            $request->setReturnPartialSuccess($optionalArgs['returnPartialSuccess']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->getPagedListResponse('List', $optionalArgs, RegionInstanceGroupManagerList::class, $request);
    }

    /**
     * Lists all errors thrown by actions on instances for a given regional managed instance group. The filter and orderBy query parameters are not supported.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     // Iterate over pages of elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listErrors($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     *     // Alternatively:
     *     // Iterate through all elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listErrors($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager The name of the managed instance group. It must be a string that meets the requirements in RFC1035, or an unsigned long integer: must match regexp pattern: (?:[a-z](?:[-a-z0-9]{0,61}[a-z0-9])?)|1-9{0,19}.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request. This should conform to RFC1035.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type string $filter
     *           A filter expression that filters resources listed in the response. Most Compute resources support two types of filter expressions: expressions that support regular expressions and expressions that follow API improvement proposal AIP-160. If you want to use AIP-160, your expression must specify the field name, an operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The operator must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`. For example, if you are filtering Compute Engine instances, you can exclude instances named `example-instance` by specifying `name != example-instance`. The `:` operator can be used with string fields to match substrings. For non-string fields it is equivalent to the `=` operator. The `:*` comparison can be used to test whether a key has been defined. For example, to find all objects with `owner` label use: ``` labels.owner:* ``` You can also filter nested fields. For example, you could specify `scheduling.automaticRestart = false` to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels. To filter on multiple expressions, provide each separate expression within parentheses. For example: ``` (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake") ``` By default, each expression is an `AND` expression. However, you can include `AND` and `OR` expressions explicitly. For example: ``` (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true) ``` If you want to use a regular expression, use the `eq` (equal) or `ne` (not equal) operator against a single un-parenthesized expression with or without quotes or against multiple parenthesized expressions. Examples: `fieldname eq unquoted literal` `fieldname eq 'single quoted literal'` `fieldname eq "double quoted literal"` `(fieldname1 eq literal) (fieldname2 ne "literal")` The literal value is interpreted as a regular expression using Google RE2 library syntax. The literal value must match the entire field. For example, to filter for instances that do not end with name "instance", you would use `name ne .*instance`.
     *     @type int $maxResults
     *           The maximum number of results per page that should be returned. If the number of available results is larger than `maxResults`, Compute Engine returns a `nextPageToken` that can be used to get the next page of results in subsequent list requests. Acceptable values are `0` to `500`, inclusive. (Default: `500`)
     *     @type string $orderBy
     *           Sorts list results by a certain order. By default, results are returned in alphanumerical order based on the resource name. You can also sort results in descending order based on the creation timestamp using `orderBy="creationTimestamp desc"`. This sorts results based on the `creationTimestamp` field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first. Currently, only sorting by `name` or `creationTimestamp desc` is supported.
     *     @type string $pageToken
     *           A page token is used to specify a page of values to be returned.
     *           If no page token is specified (the default), the first page
     *           of values will be returned. Any page token used here must have
     *           been generated by a previous call to the API.
     *     @type bool $returnPartialSuccess
     *           Opt-in for partial success behavior which provides partial results in case of failure. The default value is false.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function listErrors($instanceGroupManager, $project, $region, array $optionalArgs = [])
    {
        $request = new ListErrorsRegionInstanceGroupManagersRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['filter'])) {
            $request->setFilter($optionalArgs['filter']);
        }

        if (isset($optionalArgs['maxResults'])) {
            $request->setMaxResults($optionalArgs['maxResults']);
        }

        if (isset($optionalArgs['orderBy'])) {
            $request->setOrderBy($optionalArgs['orderBy']);
        }

        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        if (isset($optionalArgs['returnPartialSuccess'])) {
            $request->setReturnPartialSuccess($optionalArgs['returnPartialSuccess']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->getPagedListResponse('ListErrors', $optionalArgs, RegionInstanceGroupManagersListErrorsResponse::class, $request);
    }

    /**
     * Lists the instances in the managed instance group and instances that are scheduled to be created. The list includes any current actions that the group has scheduled for its instances. The orderBy query parameter is not supported. The `pageToken` query parameter is supported only in the alpha and beta API and only if the group's `listManagedInstancesResults` field is set to `PAGINATED`.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     // Iterate over pages of elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listManagedInstances($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     *     // Alternatively:
     *     // Iterate through all elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listManagedInstances($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager The name of the managed instance group.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type string $filter
     *           A filter expression that filters resources listed in the response. Most Compute resources support two types of filter expressions: expressions that support regular expressions and expressions that follow API improvement proposal AIP-160. If you want to use AIP-160, your expression must specify the field name, an operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The operator must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`. For example, if you are filtering Compute Engine instances, you can exclude instances named `example-instance` by specifying `name != example-instance`. The `:` operator can be used with string fields to match substrings. For non-string fields it is equivalent to the `=` operator. The `:*` comparison can be used to test whether a key has been defined. For example, to find all objects with `owner` label use: ``` labels.owner:* ``` You can also filter nested fields. For example, you could specify `scheduling.automaticRestart = false` to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels. To filter on multiple expressions, provide each separate expression within parentheses. For example: ``` (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake") ``` By default, each expression is an `AND` expression. However, you can include `AND` and `OR` expressions explicitly. For example: ``` (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true) ``` If you want to use a regular expression, use the `eq` (equal) or `ne` (not equal) operator against a single un-parenthesized expression with or without quotes or against multiple parenthesized expressions. Examples: `fieldname eq unquoted literal` `fieldname eq 'single quoted literal'` `fieldname eq "double quoted literal"` `(fieldname1 eq literal) (fieldname2 ne "literal")` The literal value is interpreted as a regular expression using Google RE2 library syntax. The literal value must match the entire field. For example, to filter for instances that do not end with name "instance", you would use `name ne .*instance`.
     *     @type int $maxResults
     *           The maximum number of results per page that should be returned. If the number of available results is larger than `maxResults`, Compute Engine returns a `nextPageToken` that can be used to get the next page of results in subsequent list requests. Acceptable values are `0` to `500`, inclusive. (Default: `500`)
     *     @type string $orderBy
     *           Sorts list results by a certain order. By default, results are returned in alphanumerical order based on the resource name. You can also sort results in descending order based on the creation timestamp using `orderBy="creationTimestamp desc"`. This sorts results based on the `creationTimestamp` field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first. Currently, only sorting by `name` or `creationTimestamp desc` is supported.
     *     @type string $pageToken
     *           A page token is used to specify a page of values to be returned.
     *           If no page token is specified (the default), the first page
     *           of values will be returned. Any page token used here must have
     *           been generated by a previous call to the API.
     *     @type bool $returnPartialSuccess
     *           Opt-in for partial success behavior which provides partial results in case of failure. The default value is false.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function listManagedInstances($instanceGroupManager, $project, $region, array $optionalArgs = [])
    {
        $request = new ListManagedInstancesRegionInstanceGroupManagersRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['filter'])) {
            $request->setFilter($optionalArgs['filter']);
        }

        if (isset($optionalArgs['maxResults'])) {
            $request->setMaxResults($optionalArgs['maxResults']);
        }

        if (isset($optionalArgs['orderBy'])) {
            $request->setOrderBy($optionalArgs['orderBy']);
        }

        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        if (isset($optionalArgs['returnPartialSuccess'])) {
            $request->setReturnPartialSuccess($optionalArgs['returnPartialSuccess']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->getPagedListResponse('ListManagedInstances', $optionalArgs, RegionInstanceGroupManagersListInstancesResponse::class, $request);
    }

    /**
     * Lists all of the per-instance configurations defined for the managed instance group. The orderBy query parameter is not supported.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     // Iterate over pages of elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listPerInstanceConfigs($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     *     // Alternatively:
     *     // Iterate through all elements
     *     $pagedResponse = $regionInstanceGroupManagersClient->listPerInstanceConfigs($instanceGroupManager, $project, $region);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager The name of the managed instance group. It should conform to RFC1035.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request, should conform to RFC1035.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type string $filter
     *           A filter expression that filters resources listed in the response. Most Compute resources support two types of filter expressions: expressions that support regular expressions and expressions that follow API improvement proposal AIP-160. If you want to use AIP-160, your expression must specify the field name, an operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The operator must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`. For example, if you are filtering Compute Engine instances, you can exclude instances named `example-instance` by specifying `name != example-instance`. The `:` operator can be used with string fields to match substrings. For non-string fields it is equivalent to the `=` operator. The `:*` comparison can be used to test whether a key has been defined. For example, to find all objects with `owner` label use: ``` labels.owner:* ``` You can also filter nested fields. For example, you could specify `scheduling.automaticRestart = false` to include instances only if they are not scheduled for automatic restarts. You can use filtering on nested fields to filter based on resource labels. To filter on multiple expressions, provide each separate expression within parentheses. For example: ``` (scheduling.automaticRestart = true) (cpuPlatform = "Intel Skylake") ``` By default, each expression is an `AND` expression. However, you can include `AND` and `OR` expressions explicitly. For example: ``` (cpuPlatform = "Intel Skylake") OR (cpuPlatform = "Intel Broadwell") AND (scheduling.automaticRestart = true) ``` If you want to use a regular expression, use the `eq` (equal) or `ne` (not equal) operator against a single un-parenthesized expression with or without quotes or against multiple parenthesized expressions. Examples: `fieldname eq unquoted literal` `fieldname eq 'single quoted literal'` `fieldname eq "double quoted literal"` `(fieldname1 eq literal) (fieldname2 ne "literal")` The literal value is interpreted as a regular expression using Google RE2 library syntax. The literal value must match the entire field. For example, to filter for instances that do not end with name "instance", you would use `name ne .*instance`.
     *     @type int $maxResults
     *           The maximum number of results per page that should be returned. If the number of available results is larger than `maxResults`, Compute Engine returns a `nextPageToken` that can be used to get the next page of results in subsequent list requests. Acceptable values are `0` to `500`, inclusive. (Default: `500`)
     *     @type string $orderBy
     *           Sorts list results by a certain order. By default, results are returned in alphanumerical order based on the resource name. You can also sort results in descending order based on the creation timestamp using `orderBy="creationTimestamp desc"`. This sorts results based on the `creationTimestamp` field in reverse chronological order (newest result first). Use this to sort resources like operations so that the newest operation is returned first. Currently, only sorting by `name` or `creationTimestamp desc` is supported.
     *     @type string $pageToken
     *           A page token is used to specify a page of values to be returned.
     *           If no page token is specified (the default), the first page
     *           of values will be returned. Any page token used here must have
     *           been generated by a previous call to the API.
     *     @type bool $returnPartialSuccess
     *           Opt-in for partial success behavior which provides partial results in case of failure. The default value is false.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function listPerInstanceConfigs($instanceGroupManager, $project, $region, array $optionalArgs = [])
    {
        $request = new ListPerInstanceConfigsRegionInstanceGroupManagersRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['filter'])) {
            $request->setFilter($optionalArgs['filter']);
        }

        if (isset($optionalArgs['maxResults'])) {
            $request->setMaxResults($optionalArgs['maxResults']);
        }

        if (isset($optionalArgs['orderBy'])) {
            $request->setOrderBy($optionalArgs['orderBy']);
        }

        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        if (isset($optionalArgs['returnPartialSuccess'])) {
            $request->setReturnPartialSuccess($optionalArgs['returnPartialSuccess']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->getPagedListResponse('ListPerInstanceConfigs', $optionalArgs, RegionInstanceGroupManagersListInstanceConfigsResp::class, $request);
    }

    /**
     * Updates a managed instance group using the information that you specify in the request. This operation is marked as DONE when the group is patched even if the instances in the group are still in the process of being patched. You must separately verify the status of the individual instances with the listmanagedinstances method. This method supports PATCH semantics and uses the JSON merge patch format and processing rules. If you update your group to specify a new template or instance configuration, it's possible that your intended specification for each VM in the group is different from the current state of that VM. To learn how to apply an updated configuration to the VMs in a MIG, see Updating instances in a MIG.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $instanceGroupManagerResource = new InstanceGroupManager();
     *     $project = 'project';
     *     $region = 'region';
     *     $operationResponse = $regionInstanceGroupManagersClient->patch($instanceGroupManager, $instanceGroupManagerResource, $project, $region);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->patch($instanceGroupManager, $instanceGroupManagerResource, $project, $region);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'patch');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string               $instanceGroupManager         The name of the instance group manager.
     * @param InstanceGroupManager $instanceGroupManagerResource The body resource for this request
     * @param string               $project                      Project ID for this request.
     * @param string               $region                       Name of the region scoping this request.
     * @param array                $optionalArgs                 {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function patch($instanceGroupManager, $instanceGroupManagerResource, $project, $region, array $optionalArgs = [])
    {
        $request = new PatchRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setInstanceGroupManagerResource($instanceGroupManagerResource);
        $request->setProject($project);
        $request->setRegion($region);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('Patch', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Inserts or patches per-instance configurations for the managed instance group. perInstanceConfig.name serves as a key used to distinguish whether to perform insert or patch.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagerPatchInstanceConfigReqResource = new RegionInstanceGroupManagerPatchInstanceConfigReq();
     *     $operationResponse = $regionInstanceGroupManagersClient->patchPerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerPatchInstanceConfigReqResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->patchPerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerPatchInstanceConfigReqResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'patchPerInstanceConfigs');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                           $instanceGroupManager                                     The name of the managed instance group. It should conform to RFC1035.
     * @param string                                           $project                                                  Project ID for this request.
     * @param string                                           $region                                                   Name of the region scoping this request, should conform to RFC1035.
     * @param RegionInstanceGroupManagerPatchInstanceConfigReq $regionInstanceGroupManagerPatchInstanceConfigReqResource The body resource for this request
     * @param array                                            $optionalArgs                                             {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function patchPerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerPatchInstanceConfigReqResource, array $optionalArgs = [])
    {
        $request = new PatchPerInstanceConfigsRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagerPatchInstanceConfigReqResource($regionInstanceGroupManagerPatchInstanceConfigReqResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('PatchPerInstanceConfigs', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Flags the specified VM instances in the managed instance group to be immediately recreated. Each instance is recreated using the group's current configuration. This operation is marked as DONE when the flag is set even if the instances have not yet been recreated. You must separately verify the status of each instance by checking its currentAction field; for more information, see Checking the status of managed instances. If the group is part of a backend service that has enabled connection draining, it can take up to 60 seconds after the connection draining duration has elapsed before the VM instance is removed or deleted. You can specify a maximum of 1000 instances with this method per request.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersRecreateRequestResource = new RegionInstanceGroupManagersRecreateRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->recreateInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersRecreateRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->recreateInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersRecreateRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'recreateInstances');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                     $instanceGroupManager                               Name of the managed instance group.
     * @param string                                     $project                                            Project ID for this request.
     * @param string                                     $region                                             Name of the region scoping this request.
     * @param RegionInstanceGroupManagersRecreateRequest $regionInstanceGroupManagersRecreateRequestResource The body resource for this request
     * @param array                                      $optionalArgs                                       {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function recreateInstances($instanceGroupManager, $project, $region, $regionInstanceGroupManagersRecreateRequestResource, array $optionalArgs = [])
    {
        $request = new RecreateInstancesRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersRecreateRequestResource($regionInstanceGroupManagersRecreateRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('RecreateInstances', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Changes the intended size of the managed instance group. If you increase the size, the group creates new instances using the current instance template. If you decrease the size, the group deletes one or more instances. The resize operation is marked DONE if the resize request is successful. The underlying actions take additional time. You must separately verify the status of the creating or deleting actions with the listmanagedinstances method. If the group is part of a backend service that has enabled connection draining, it can take up to 60 seconds after the connection draining duration has elapsed before the VM instance is removed or deleted.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $size = 0;
     *     $operationResponse = $regionInstanceGroupManagersClient->resize($instanceGroupManager, $project, $region, $size);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->resize($instanceGroupManager, $project, $region, $size);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'resize');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string $instanceGroupManager Name of the managed instance group.
     * @param string $project              Project ID for this request.
     * @param string $region               Name of the region scoping this request.
     * @param int    $size                 Number of instances that should exist in this instance group manager.
     * @param array  $optionalArgs         {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function resize($instanceGroupManager, $project, $region, $size, array $optionalArgs = [])
    {
        $request = new ResizeRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setSize($size);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('Resize', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Sets the instance template to use when creating new instances or recreating instances in this group. Existing instances are not affected.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersSetTemplateRequestResource = new RegionInstanceGroupManagersSetTemplateRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->setInstanceTemplate($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTemplateRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->setInstanceTemplate($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTemplateRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'setInstanceTemplate');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                        $instanceGroupManager                                  The name of the managed instance group.
     * @param string                                        $project                                               Project ID for this request.
     * @param string                                        $region                                                Name of the region scoping this request.
     * @param RegionInstanceGroupManagersSetTemplateRequest $regionInstanceGroupManagersSetTemplateRequestResource The body resource for this request
     * @param array                                         $optionalArgs                                          {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function setInstanceTemplate($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTemplateRequestResource, array $optionalArgs = [])
    {
        $request = new SetInstanceTemplateRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersSetTemplateRequestResource($regionInstanceGroupManagersSetTemplateRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('SetInstanceTemplate', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Modifies the target pools to which all new instances in this group are assigned. Existing instances in the group are not affected.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagersSetTargetPoolsRequestResource = new RegionInstanceGroupManagersSetTargetPoolsRequest();
     *     $operationResponse = $regionInstanceGroupManagersClient->setTargetPools($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTargetPoolsRequestResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->setTargetPools($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTargetPoolsRequestResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'setTargetPools');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                           $instanceGroupManager                                     Name of the managed instance group.
     * @param string                                           $project                                                  Project ID for this request.
     * @param string                                           $region                                                   Name of the region scoping this request.
     * @param RegionInstanceGroupManagersSetTargetPoolsRequest $regionInstanceGroupManagersSetTargetPoolsRequestResource The body resource for this request
     * @param array                                            $optionalArgs                                             {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function setTargetPools($instanceGroupManager, $project, $region, $regionInstanceGroupManagersSetTargetPoolsRequestResource, array $optionalArgs = [])
    {
        $request = new SetTargetPoolsRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagersSetTargetPoolsRequestResource($regionInstanceGroupManagersSetTargetPoolsRequestResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('SetTargetPools', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }

    /**
     * Inserts or updates per-instance configurations for the managed instance group. perInstanceConfig.name serves as a key used to distinguish whether to perform insert or patch.
     *
     * Sample code:
     * ```
     * $regionInstanceGroupManagersClient = new RegionInstanceGroupManagersClient();
     * try {
     *     $instanceGroupManager = 'instance_group_manager';
     *     $project = 'project';
     *     $region = 'region';
     *     $regionInstanceGroupManagerUpdateInstanceConfigReqResource = new RegionInstanceGroupManagerUpdateInstanceConfigReq();
     *     $operationResponse = $regionInstanceGroupManagersClient->updatePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerUpdateInstanceConfigReqResource);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $regionInstanceGroupManagersClient->updatePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerUpdateInstanceConfigReqResource);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $regionInstanceGroupManagersClient->resumeOperation($operationName, 'updatePerInstanceConfigs');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // if creating/modifying, retrieve the target resource
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $regionInstanceGroupManagersClient->close();
     * }
     * ```
     *
     * @param string                                            $instanceGroupManager                                      The name of the managed instance group. It should conform to RFC1035.
     * @param string                                            $project                                                   Project ID for this request.
     * @param string                                            $region                                                    Name of the region scoping this request, should conform to RFC1035.
     * @param RegionInstanceGroupManagerUpdateInstanceConfigReq $regionInstanceGroupManagerUpdateInstanceConfigReqResource The body resource for this request
     * @param array                                             $optionalArgs                                              {
     *     Optional.
     *
     *     @type string $requestId
     *           An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported ( 00000000-0000-0000-0000-000000000000).
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a {@see RetrySettings} object, or an
     *           associative array of retry settings parameters. See the documentation on
     *           {@see RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function updatePerInstanceConfigs($instanceGroupManager, $project, $region, $regionInstanceGroupManagerUpdateInstanceConfigReqResource, array $optionalArgs = [])
    {
        $request = new UpdatePerInstanceConfigsRegionInstanceGroupManagerRequest();
        $requestParamHeaders = [];
        $request->setInstanceGroupManager($instanceGroupManager);
        $request->setProject($project);
        $request->setRegion($region);
        $request->setRegionInstanceGroupManagerUpdateInstanceConfigReqResource($regionInstanceGroupManagerUpdateInstanceConfigReqResource);
        $requestParamHeaders['instance_group_manager'] = $instanceGroupManager;
        $requestParamHeaders['project'] = $project;
        $requestParamHeaders['region'] = $region;
        if (isset($optionalArgs['requestId'])) {
            $request->setRequestId($optionalArgs['requestId']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('UpdatePerInstanceConfigs', $optionalArgs, $request, $this->getOperationsClient(), null, Operation::class)->wait();
    }
}