1, 'defaultRegion' => 'us-west-2', 'testCases' => [['operationName' => 'DescribeStacks', 'input' => [], 'errorExpectedFromService' => \false], ['operationName' => 'DescribeLayers', 'input' => ['StackId' => 'fake_stack'], 'errorExpectedFromService' => \true]]];