code: def retrieveVals(self):
          
          ntpinfo = NTPinfo()
          stats = ntpinfo.getHostOffset(self._remoteHost)
          if stats:
              graph_name = 'ntp_host_stratum_%s' % self._remoteHost
              if self.hasGraph(graph_name):
                  self.setGraphVal(graph_name, 'stratum', stats.get('stratum'))
              graph_name = 'ntp_host_stat_%s' % self._remoteHost
              if self.hasGraph(graph_name):
                  self.setGraphVal(graph_name, 'offset', stats.get('offset'))
                  self.setGraphVal(graph_name, 'delay', stats.get('delay'))
docs: Retrieve values for graphs.