if (xreq->queryitf->unsubscribe)
return xreq->queryitf->unsubscribe(xreq, event);
ERROR("no event listener, unsubscription impossible");
if (xreq->queryitf->unsubscribe)
return xreq->queryitf->unsubscribe(xreq, event);
ERROR("no event listener, unsubscription impossible");