code: def retrieveVals(self):
          
          fs = FSinfo(self._fshost, self._fsport, self._fspass)
          if self.hasGraph('fs_calls'):
              count = fs.getCallCount()
              self.setGraphVal('fs_calls', 'calls', count)
          if self.hasGraph('fs_channels'):
              count = fs.getChannelCount()
              self.setGraphVal('fs_channels', 'channels', count)
docs: Retrieve values for graphs.