code: def cache_key(self):
      # TODO : hash should be attribute of `self`
      if self.hash is None:
          dependencies_finder = DependenciesFinder(
              globals=self.__globals__, src=self.src
          )
          dependencies_finder.visit(self.parse())
          self.hash = dependencies_finder.ret + str(
              self.starting_line_number
          )
      return self.hash
  
imports: from __future__ import annotations, division
  import ast
  import hashlib
  import inspect
  import os
  import textwrap
  from collections import defaultdict, namedtuple
  from functools import cached_property
  from typing import Callable, Generic, Iterable, List, Optional, TypeVar, Union, cast, overload
  from ..runtime.driver import driver
label_desc: Use image node_id 9 for calling the JITFunction obj's underlying member method code with example usage: obj.cache_key() and returns: self