code: def mo_file(self) -> str:
      return self.domain + ".mo"
  
imports: from __future__ import annotations
  import os
  import re
  from datetime import datetime, timezone
  from os import path
  from typing import TYPE_CHECKING, Callable, NamedTuple
  import babel.dates
  from babel.messages.mofile import write_mo
  from babel.messages.pofile import read_po
  from sphinx.errors import SphinxError
  from sphinx.locale import __
  from sphinx.util import logging
  from sphinx.util.osutil import SEP, canon_path, relpath
label_desc: Use image node_id 2 for calling the CatalogInfo obj's underlying member method code with example usage: obj.mo_file() and returns: unknown