我有一个Angular5应用程序，其组件中包含以下代码:ngOnInit(){Observable.forkJoin([this.highlightedInsight=this.insightService.getHighlightedInsight(),this.insights=this.insightService.getInsightsList(),this.topics=this.insightService.getInsightTopicsList()]).subscribe(response=>{},error=>{console.log('Anerroroccurred