class_docstr: Validator class that accepts any input.
class_docstr_tok: ["Validator","class","that","accepts","any","input","."]
code: def validate(self, document: Document) -> None:
      pass
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod
  from typing import Callable
  from prompt_toolkit.eventloop import run_in_executor_with_context
  from .document import Document
  from .filters import FilterOrBool, to_filter
label_desc: Use image node_id 1 for calling the DummyValidator obj's underlying member method code with example usage: obj.validate(document) without return types