code: @Override
      public UpdatePipelineNotificationsResult updatePipelineNotifications(UpdatePipelineNotificationsRequest request) {
          request = beforeClientExecution(request);
          return executeUpdatePipelineNotifications(request);
      }
docs: <p>
  With the UpdatePipelineNotifications operation, you can update Amazon Simple Notification Service (Amazon SNS)
  notifications for a pipeline.
  </p>
  <p>
  When you update notifications for a pipeline, Elastic Transcoder returns the values that you specified in the
  request.
  </p>
  
  @param updatePipelineNotificationsRequest
  The <code>UpdatePipelineNotificationsRequest</code> structure.
  @return Result of the UpdatePipelineNotifications operation returned by the service.
  @throws ValidationException
  One or more required parameter values were not provided in the request.
  @throws IncompatibleVersionException
  @throws ResourceNotFoundException
  The requested resource does not exist or is not available. For example, the pipeline to which you're
  trying to add a job doesn't exist or is still being created.
  @throws ResourceInUseException
  The resource you are attempting to change is in use. For example, you are attempting to delete a pipeline
  that is currently in use.
  @throws AccessDeniedException
  General authentication failure. The request was not signed correctly.
  @throws InternalServiceException
  Elastic Transcoder encountered an unexpected exception while trying to fulfill the request.
  @sample AmazonElasticTranscoder.UpdatePipelineNotifications