code: @Override
      public StartStreamProcessorResult startStreamProcessor(StartStreamProcessorRequest request) {
          request = beforeClientExecution(request);
          return executeStartStreamProcessor(request);
      }
docs: <p>
  Starts processing a stream processor. You create a stream processor by calling <a>CreateStreamProcessor</a>. To
  tell <code>StartStreamProcessor</code> which stream processor to start, use the value of the <code>Name</code>
  field specified in the call to <code>CreateStreamProcessor</code>.
  </p>
  
  @param startStreamProcessorRequest
  @return Result of the StartStreamProcessor 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 ResourceInUseException
  @throws ProvisionedThroughputExceededException
  The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon
  Rekognition.
  @sample AmazonRekognition.StartStreamProcessor