def METHOD_NAME(self, request):
    """
    If model has object-level permissions, narrow queryset to object
    to which user has permissions.
    """
    queryset = super().METHOD_NAME(request)
    if issubclass(self.model, PermissionsForObjectMixin):
        queryset = self.model._get_objects_for_user(request.user, queryset)
    return queryset