code: def _sync_call(self, *args, **kwargs):
      try:
          if self.has_single_func:
              return self.func(*args, **kwargs)
      except NotImplementedError:
          self.has_single_func = False
  
      if self.batch_func is not None:
          return self.batch_func([args], [kwargs])[0]
      raise NotImplementedError
  
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 _ExtensibleCallable obj's underlying member method code with example usage: obj._sync_call() and returns: self, self