code: def math_role(
      role, rawtext, text, lineno, inliner, options={}, content=[]
  ):
      i = rawtext.find("`")
      latex = rawtext[i + 1 : -1]
      node = latex_math(rawtext)
      node["latex"] = latex
      node["fontset"] = options.get("fontset", "cm")
      return [node], []
  
file_path: catboost/contrib/python/matplotlib/py2/matplotlib/sphinxext/mathmpl.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import hashlib
  import os
  import sys
  import warnings
  from docutils import nodes
  from docutils.parsers.rst import directives
  import sphinx
  from matplotlib import rcParams
  from matplotlib.mathtext import MathTextParser
label_desc: Use image node_id 2 for calling a global function with example usage: math_role(role, rawtext, text, lineno, inliner, options, content) and returns: list,  list