code: def chunk_op_keys(self) -> List[str]:
      return list(self._chunk_op_key_to_result.keys())
  
imports: import functools
  import io
  import os
  import sys
  import textwrap
  import weakref
  from typing import List, Callable, Type
  from ..typing import OperandType, TileableType, SessionType
  from .context import Context
label_desc: Use image node_id 3 for calling the LogFetcher obj's underlying member method code with example usage: obj.chunk_op_keys() and returns: list