code: def stillRecording(self, deviceId, dataCount):
          
          status = self.recordingDevices[deviceId]
          if status is not None:
              if status['state'] == MeasurementStatus.RECORDING.name:
                  status['last'] = datetime.datetime.utcnow().strftime(DATETIME_FORMAT)
                  status['count'] = status['count'] + dataCount
docs: For a device that is recording, updates the last timestamp so we now when we last received data.
          :param deviceId: the device id.
          :param dataCount: the no of items of data recorded in this batch.
          :return: