我有一些可观察的东西。而且我需要知道哪个触发了订阅。
Observable.combineLatest(
this.tournamentsService.getUpcoming(),
this.favoriteService.getFavoriteTournaments(),
this.teamsService.getTeamRanking(),
(tournament, favorite, team) => {
//what triggered combinelatest to run?
}).subscribe()