docs: def _fullqualname_function_py3(obj):
      """Fully qualified name for 'function' objects in Python 3.
      """
  
      if hasattr(obj, "__wrapped__"):
          # Required for decorator.__version__ <= 4.0.0.
          qualname = obj.__wrapped__.__qualname__
      else:
          qualname = obj.__qualname__
  
      return obj.__module__ + '.' + qualname