code: def normalized_start(self):
      
      namespaces_after_key = list(self.make_datastore_query().Run(limit=1))
  
      if not namespaces_after_key:
        return None
  
      namespace_after_key = namespaces_after_key[0].name() or ''
      return NamespaceRange(namespace_after_key,
                            self.namespace_end,
                            _app=self.app)
docs: Returns a NamespaceRange with leading non-existant namespaces removed.
  
      Returns:
        A copy of this NamespaceRange whose namespace_start is adjusted to exclude
        the portion of the range that contains no actual namespaces in the
        datastore. None is returned if the NamespaceRange contains no actual
        namespaces in the datastore.