code: def list_kadastrale_afdelingen(self):
          '''
          List all `kadastrale afdelingen` in Flanders.
          :param integer sort: Field to sort on.
          :rtype: A :class:`list` of :class:`Afdeling`.
          '''
          def creator():
              gemeentes = self.list_gemeenten()
              res = []
              for g in gemeentes:
                  res += self.list_kadastrale_afdelingen_by_gemeente(g)
              return res
          if self.caches['permanent'].is_configured:
              key = 'list_afdelingen_rest'
              afdelingen = self.caches['permanent'].get_or_create(key, creator)
          else:
              afdelingen = creator()
          return afdelingen