code: @Override
      public DescribeServiceActionResult describeServiceAction(DescribeServiceActionRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeServiceAction(request);
      }
docs: <p>
  Describes a self-service action.
  </p>
  
  @param describeServiceActionRequest
  @return Result of the DescribeServiceAction operation returned by the service.
  @throws ResourceNotFoundException
  The specified resource was not found.
  @sample AWSServiceCatalog.DescribeServiceAction
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/servicecatalog-2015-12-10/DescribeServiceAction"
  target="_top">AWS API Documentation</a>