class_docstr: postprocess abstract class
docstr: implementation func 
docstr_tok: ["implementation","func"]
code: def call(self):
      """implementation func"""
      raise NotImplementedError()
  
file_path: delta/delta/utils/postprocess/base_postproc.py
imports: import abc
label_desc: Use image node_id 2 for calling the PostProcABC obj's underlying member method code with example usage: obj.call() without return types