['DescribeReservedElasticsearchInstanceOfferings' => ['input_token' => 'NextToken', 'output_token' => 'NextToken', 'limit_key' => 'MaxResults'], 'DescribeReservedElasticsearchInstances' => ['input_token' => 'NextToken', 'output_token' => 'NextToken', 'limit_key' => 'MaxResults'], 'GetUpgradeHistory' => ['input_token' => 'NextToken', 'output_token' => 'NextToken', 'limit_key' => 'MaxResults'], 'ListElasticsearchInstanceTypes' => ['input_token' => 'NextToken', 'output_token' => 'NextToken', 'limit_key' => 'MaxResults'], 'ListElasticsearchVersions' => ['input_token' => 'NextToken', 'output_token' => 'NextToken', 'limit_key' => 'MaxResults']]];