code: def setup(app):  # noqa: D103
      app.add_directive("mne", MNESubstitution)
      return {
          "version": "0.1",
          "parallel_read_safe": True,
          "parallel_write_safe": True,
      }
  
file_path: mne-python/doc/sphinxext/mne_substitutions.py
imports: from docutils import nodes
  from docutils.parsers.rst import Directive
  from docutils.statemachine import StringList
  from mne.defaults import DEFAULTS
  from mne._fiff.pick import _PICK_TYPES_DATA_DICT, _DATA_CH_TYPES_SPLIT, _DATA_CH_TYPES_ORDER_DEFAULT
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) and returns: dict