code: def retrieveVals(self):
          
          ntpinfo = NTPinfo()
          ntpstats = ntpinfo.getHostOffsets(self._remoteHosts)
          if ntpstats:
              for host in self._remoteHosts:
                  hostkey = re.sub('\.', '_', host)
                  hoststats = ntpstats.get(host)
                  if hoststats:
                      if self.hasGraph('ntp_host_stratums'):
                          self.setGraphVal('ntp_host_stratums', hostkey, 
                                           hoststats.get('stratum'))
                      if self.hasGraph('ntp_host_offsets'):
                          self.setGraphVal('ntp_host_offsets', hostkey, 
                                           hoststats.get('offset'))
                      if self.hasGraph('ntp_host_delays'):
                          self.setGraphVal('ntp_host_delays', hostkey, 
                                           hoststats.get('delay'))
docs: Retrieve values for graphs.