void source_event_subscribe();
void source_event_cleanup(struct source_event* evt);
void source_event_add_user_data(Gom_ctxt ctxt, struct user_data* data);
void source_event_subscribe();
void source_event_cleanup(struct source_event* evt);
void source_event_add_user_data(Gom_ctxt ctxt, struct user_data* data);