code: def get_key_element(self) -> str:
      def get_key() -> str:
          if self.package is None:
              return self.key_or_group
          else:
              return f"{self.key_or_group}@{self.package}"
  
      def get_prefix() -> str:
          if self.is_delete():
              return "~"
          elif self.is_add():
              return "+"
          elif self.is_force_add():
              return "++"
          else:
              return ""
  
      return f"{get_prefix()}{get_key()}"
  
imports: import decimal
  import fnmatch
  from copy import copy
  from dataclasses import dataclass, field
  from enum import Enum
  from random import shuffle
  from textwrap import dedent
  from typing import Any, Callable, Dict, Iterator, List, Optional, Set, Union, cast
  from omegaconf import OmegaConf
  from omegaconf._utils import is_structured_config
  from hydra import version
  from hydra._internal.deprecation_warning import deprecation_warning
  from hydra._internal.grammar.utils import _ESC_QUOTED_STR, escape_special_characters
  from hydra.core.config_loader import ConfigLoader
  from hydra.core.object_type import ObjectType
  from hydra.errors import HydraException
label_desc: Use image node_id 14 for calling the Override obj's underlying member method code with example usage: obj.get_key_element() and returns: get_prefix, get_key, self, self, str, self, str, str, str, str