code: def assets(self):
          
          if self._assets is None:
              self._assets = AssetList(self._version, service_sid=self._solution['sid'], )
          return self._assets
docs: Access the assets
  
          :returns: twilio.rest.serverless.v1.service.asset.AssetList
          :rtype: twilio.rest.serverless.v1.service.asset.AssetList