docs: def assert_is_known_node_id(self, node_list_pyxb, node_id):
          """When importing from a CN, ensure that the NodeID which the ObjectList will be
          filtered by is known to the CN."""
          node_pyxb = self.find_node_by_id(node_list_pyxb, node_id)
          assert node_pyxb is not None, (
              "The NodeID of this GMN instance is unknown to the CN at the provided BaseURL. "
              'node_id="{}" base_url="{}"'.format(node_id, self.options["baseurl"])
          )