def _CB_CONTROL_EXIT(self, result, packet):
      if self.onCloseCB:
         for x in self.onCloseCB:
            try:
               x()
            except Exception:
               if x in self.onCloseCB:
                  self.onCloseCB.remove(x)
      if self.videobackend_activate is False:
         if vbcfg.g_service is not None:
            self._session.nav.playService(vbcfg.g_service)
      return (True, None)

   def _CB_CONTROL_EXIT(self, result, packet):
      if self.onCloseCB:
         for x in self.onCloseCB:
            try:
               x()
            except Exception:
               if x in self.onCloseCB:
                  self.onCloseCB.remove(x)
      return (True, None)