def rename_feature(self, old_feature, new_feature):
        """
        Change the label of a feature attached to the Bundle

        :parameter str old_feature: the current name of the feature
            (must exist)
        :parameter str new_feature: the desired new name of the feature
            (must not exist)
        :return: None
        :raises ValueError: if the new_feature is forbidden
        """
        # TODO: raise error if old_feature not found?

        self._check_label(new_feature)
        self._rename_label('feature', old_feature, new_feature)