code: @Override
      public DescribeStreamProcessorResult describeStreamProcessor(DescribeStreamProcessorRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeStreamProcessor(request);
      }
docs: <p>
  Provides information about a stream processor created by <a>CreateStreamProcessor</a>. You can get information
  about the input and output streams, the input parameters for the face recognition being performed, and the
  current status of the stream processor.
  </p>
  
  @param describeStreamProcessorRequest
  @return Result of the DescribeStreamProcessor operation returned by the service.
  @throws AccessDeniedException
  You are not authorized to perform the action.
  @throws InternalServerErrorException
  Amazon Rekognition experienced a service issue. Try your call again.
  @throws ThrottlingException
  Amazon Rekognition is temporarily unable to process the request. Try your call again.
  @throws InvalidParameterException
  Input parameter violated a constraint. Validate your parameter before calling the API operation again.
  @throws ResourceNotFoundException
  The collection specified in the request cannot be found.
  @throws ProvisionedThroughputExceededException
  The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon
  Rekognition.
  @sample AmazonRekognition.DescribeStreamProcessor