code: @Override
      public EngineDefaults describeEngineDefaultClusterParameters(DescribeEngineDefaultClusterParametersRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeEngineDefaultClusterParameters(request);
      }
docs: <p>
  Returns the default engine and system parameter information for the cluster database engine.
  </p>
  
  @param describeEngineDefaultClusterParametersRequest
  @return Result of the DescribeEngineDefaultClusterParameters operation returned by the service.
  @sample AmazonNeptune.DescribeEngineDefaultClusterParameters
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/neptune-2014-10-31/DescribeEngineDefaultClusterParameters"
  target="_top">AWS API Documentation</a>