Method freeze

celery/canvas.py:1093–1102

(self, _id=None, group_id=None, chord=None,
               root_id=None, parent_id=None, group_index=None)

    # in order for a chain to be frozen, each of the members of the chain individually needs to be frozen
    # TODO figure out why we are always cloning before freeze
    def freeze(self, _id=None, group_id=None, chord=None,
               root_id=None, parent_id=None, group_index=None):
        # pylint: disable=redefined-outer-name
        #   XXX chord is also a class in outer scope.
        _, results = self._frozen = self.prepare_steps(
            self.args, self.kwargs, self.tasks, root_id, parent_id, None,
            self.app, _id, group_id, chord, clone=False,
            group_index=group_index,
        )
        return results[0]

    def stamp(self, visitor=None, append_stamps=False, **headers):
        visitor_headers = None