code: def __call__(self, sample_dict, net_out_dict):
      pp_out_dict = self._process(sample_dict, net_out_dict)
      return build_info_dict("pp_out", pp_out_dict)
  
imports: import abc
  from paddlepanseg.cvlibs import build_info_dict
label_desc: Use image node_id 3 for calling the Postprocessor obj's underlying member method code with example usage: obj.__call__(sample_dict, net_out_dict) and returns: build_info_dict