code: def active_devices(self, active_devices):
          
          if active_devices is None:
              raise ValueError("Invalid value for `active_devices`, must not be `None`")
          if active_devices is not None and active_devices < 0:
              raise ValueError("Invalid value for `active_devices`, must be a value greater than or equal to `0`")
  
          self._active_devices = active_devices
docs: Sets the active_devices of this ReportBillingData.
  
          :param active_devices: The active_devices of this ReportBillingData.
          :type: int