code: def rows(self):
          '''Iterate over queryset objects'''
          return (self.nested_row(o, n)
                  for o in self.queryset
                  for n in getattr(o, self.attribute, [])f rows(self):
          '''Iterate over queryset objects'''
          return (self.nested_row(o, n)
                  for o in self.queryset
                  for n in getattr(o, self.attribute, []))
docs: Iterate over queryset objects