code: def input(self) -> InputEffect | None:
      return self.cache_effect() or 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 6 for calling the Parser obj's underlying member method code with example usage: obj.input() and returns: unknown