code: def __call__(self, item):
      raise NotImplementedError
  
imports: import re
  from dataclasses import dataclass, InitVar, field
  from itertools import chain
  from typing import Any, Dict, List, Union, Optional, ClassVar
  import numpy
  from toolz import valfilter, valmap
label_desc: Use image node_id 1 for calling the Op obj's underlying member method code with example usage: obj.__call__(item) without return types