code: @Override
      public DescribeSigningJobResult describeSigningJob(DescribeSigningJobRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeSigningJob(request);
      }
docs: <p>
  Returns information about a specific code signing job. You specify the job by using the <code>jobId</code> value
  that is returned by the <a>StartSigningJob</a> operation.
  </p>
  
  @param describeSigningJobRequest
  @return Result of the DescribeSigningJob operation returned by the service.
  @throws ResourceNotFoundException
  A specified resource could not be found.
  @throws AccessDeniedException
  You do not have sufficient access to perform this action.
  @throws InternalServiceErrorException
  An internal error occurred.
  @sample AWSsigner.DescribeSigningJob
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/signer-2017-08-25/DescribeSigningJob" target="_top">AWS API
  Documentation</a>