# File lib/rolify/adapters/active_record/resource_adapter.rb, line 33
      def applied_roles(relation, children)
        if children
          relation.role_class.where('resource_type IN (?) AND resource_id IS NULL', self.relation_types_for(relation))
        else
          relation.role_class.where('resource_type = ? AND resource_id IS NULL', relation.to_s)
        end
      end