def list_subdomains_next_page(self):
        uri = self._paging.get("subdomain", {}).get("next_uri")
        if uri is None:
            raise exc.NoMoreResults("There are no more pages of subdomains "
                    "to list.")
        return self._list_subdomains(uri)
@param datastore_name  Name of datastore within server. May be scoped to sysname
dataset/ETHPy150Open rackspace/pyrax/pyrax/clouddns.py/CloudDNSManager.list_subdomains_next_page--crossover with--dataset/ETHPy150Open ooici/pyon/pyon/datastore/postgresql/base_store.py/PostgresDataStore.__init__