code: def get_pipeline_response(self, read_op):
      return DetectorOp(name="ppdet", input_ops=[read_op])
  
imports: import copy
  from paddle_serving_server.web_service import WebService, Op
  from paddle_serving_server.proto import general_model_config_pb2
  import google.protobuf.text_format
  import os
  import numpy
  import base64
  from PIL import Image
  import io
  from preprocess_ops import Compose
  from postprocess_ops import HRNetPostProcess
  from argparse import ArgumentParser, RawDescriptionHelpFormatter
  import yaml
label_desc: Use image node_id 1 for calling the DetectorService obj's underlying member method code with example usage: obj.get_pipeline_response(read_op) and returns: DetectorOp