struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
rc = afb_proto_ws_call_unsubscribe(wreq->call, afb_evt_event_x2_id(event));
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
rc = afb_proto_ws_call_unsubscribe(wreq->call, afb_evt_event_x2_id(event));