code: def batch(self, func: Callable):
      self.batch_func = func
      return self
  
imports: import asyncio
  import inspect
  import textwrap
  from collections import namedtuple
  from dataclasses import dataclass
  from typing import Callable, Dict, Optional, Tuple
label_desc: Use image node_id 2 for calling the _ExtensibleAccessor obj's underlying member method code with example usage: obj.batch(func) and returns: self