code: protected void unsubscribeTheEvent(EventCallBackStruct callbackStruct) throws DevFailed {
          ZMQutils.disConnectEvent(callbackStruct.device.get_tango_host(),
                  callbackStruct.device.name(),
                  callbackStruct.attr_name,
                  callbackStruct.device.get_idl_version(),
                  callbackStruct.event_name);
      }
docs: ===============================================================