1, 'defaultRegion' => 'us-west-2', 'testCases' => [['operationName' => 'DescribeWorkspaces', 'input' => [], 'errorExpectedFromService' => \false], ['operationName' => 'DescribeWorkspaces', 'input' => ['DirectoryId' => 'fake-id'], 'errorExpectedFromService' => \true]]];