code: def setup(app):
      """Required Sphinx extension setup function."""
      app.add_role("bokeh-dataframe", bokeh_dataframe)
  
      return PARALLEL_SAFE
  
file_path: bokeh/src/bokeh/sphinxext/bokeh_dataframe.py
imports: from __future__ import annotations
  import logging
  import importlib
  from docutils import nodes
  from sphinx.errors import SphinxError
  from .None import PARALLEL_SAFE
label_desc: Use image node_id 2 for calling a global function with example usage: setup(app) and returns: PARALLEL_SAFE