code: def register_type(klass, type_url=None):
      
      if type_url is None:
          type_url = _compute_type_url(klass)
      if type_url in _TYPE_URL_MAP:
          if _TYPE_URL_MAP[type_url] is not klass:
              raise ValueError("Conflict: %s" % (_TYPE_URL_MAP[type_url],))
  
      _TYPE_URL_MAP[type_url] = klass
docs: Register a klass as the factory for a given type URL.
  
      :type klass: :class:`type`
      :param klass: class to be used as a factory for the given type
  
      :type type_url: str
      :param type_url: (Optional) URL naming the type. If not provided,
                       infers the URL from the type descriptor.
  
      :raises ValueError: if a registration already exists for the URL.