def METHOD_NAME(self, namespace, names, name_order=False,
                     propagate_map_exceptions=False,
                     on_load_failure_callback=None):
    super(NamedExtensionManager, self).METHOD_NAME(
        namespace, propagate_map_exceptions=propagate_map_exceptions,
        on_load_failure_callback=on_load_failure_callback)
    self._names = names
    self._missing_names = set()
    self._name_order = name_order