text: public virtual DescribeEngineDefaultParametersResponse DescribeEngineDefaultParameters(DescribeEngineDefaultParametersRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeEngineDefaultParametersRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeEngineDefaultParametersResponseUnmarshaller.Instance;return Invoke<DescribeEngineDefaultParametersResponse>(request, options);}