code: def output(self) -> OutputEffect | None:
      return self.stack_effect()
  
imports: from dataclasses import dataclass, field
  from typing import NamedTuple, Callable, TypeVar, Literal, cast
  import lexer
  from plexer import PLexer
label_desc: Use image node_id 8 for calling the Parser obj's underlying member method code with example usage: obj.output() and returns: self