code: @Override
      public StartKeyPhrasesDetectionJobResult startKeyPhrasesDetectionJob(StartKeyPhrasesDetectionJobRequest request) {
          request = beforeClientExecution(request);
          return executeStartKeyPhrasesDetectionJob(request);
      }
docs: <p>
  Starts an asynchronous key phrase detection job for a collection of documents. Use the operation to track the
  status of a job.
  </p>
  
  @param startKeyPhrasesDetectionJobRequest
  @return Result of the StartKeyPhrasesDetectionJob operation returned by the service.
  @throws InvalidRequestException
  The request is invalid.
  @throws TooManyRequestsException
  The number of requests exceeds the limit. Resubmit your request later.
  @throws KmsKeyValidationException
  The KMS customer managed key (CMK) entered cannot be validated. Verify the key and re-enter it.
  @throws InternalServerException
  An internal server error occurred. Retry your request.
  @sample AmazonComprehend.StartKeyPhrasesDetectionJob
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/comprehend-2017-11-27/StartKeyPhrasesDetectionJob"
  target="_top">AWS API Documentation</a>