class_docstr_tok: []
code: def _column_data_changed(self, event: ColumnDataChangedEvent) -> None:
      if event.model.id in self.doc.models:
          self.doc.callbacks.trigger_on_change(event)
  
imports: from __future__ import annotations
  import logging
  import json
  import os
  import urllib
  from typing import TYPE_CHECKING, Any, Callable, Literal, Protocol, TypedDict, Union, cast, overload
  from uuid import uuid4
  from ..core.types import ID
  from ..util.serialization import make_id
  from ..util.warnings import warn
  from .state import curstate
label_desc: Use image node_id 6 for calling the CommsHandle obj's underlying member method code with example usage: obj._column_data_changed(event) without return types