full collection restore

    if destination_collection_instance.project_id != collection_instance.project_id:

        raise ServiceException(PROJECT_MISMATCH)

    _check_project_permission(user, collection_instance.project, PERM_COLLECTION_UPDATE)

    collection_instance.deleted_at = None

    collection_instance.save()

    def _restore(col_instance: Collection):

        col_instance.deleted_at = None

        col_instance.save()

        for resource_instance in col_instance.resource_set.filter(

            deleted_at__isnull=False

        ):

            # restore_resource(user, resource_instance.pk, col_instance.pk)

            resource_instance.deleted_at = None

            resource_instance.save()

        for child_collection_instance in Collection.objects.filter(parent=col_instance):

            _restore(child_collection_instance)

    # recurse collection, respawn all descendants

    _restore(collection_instance)

    move_collection(user, collection_instance.pk, destination_collection_instance.pk)

    return True