code: def skip_internal(app, what, name, obj, skip, options):
      
      docstring = inspect.getdoc(obj) or ""
  
      if skip or re.search(r"^\s*:internal:\s*$", docstring, re.M) is not None:
          return True
docs: Skip rendering autodoc when the docstring contains a line with
      only the string `:internal:`.