code: def delta_crl_distribution_points(self):
          
  
          if self._delta_crl_distribution_points is None:
              self._delta_crl_distribution_points = self._get_http_crl_distribution_points(self.freshest_crl_value)
          return self._delta_crl_distribution_points
docs: Returns delta CRL URLs - does not include complete CRLs
  
          :return:
              A list of zero or more DistributionPoint objects