code: def ilabels(self) -> Set[int]:
      return self._dead_ilabels.symmetric_difference(self._ilabels)
  
imports: from contextlib import contextmanager
  from typing import TYPE_CHECKING, Any, Callable, Dict, Iterator, List, Optional, Set, Tuple, Union, cast
  from blib2to3.pgen2.grammar import Grammar
  from blib2to3.pytree import NL, Context, Leaf, Node, RawNode, convert
  from .None import grammar, token, tokenize
label_desc: Use image node_id 2 for calling the Recorder obj's underlying member method code with example usage: obj.ilabels() and returns: self