let testTrigger = new Subject<any>();


let testTask$ = testTrigger.switchMap(()=> this.restClient.get('onet'));

testTask$.subscribe(console.log.call(console));
testTask$.subscribe(console.log.call(console));
testTask$.subscribe(console.log.call(console));
testTrigger.next(1);

let testTask$ = testTrigger.switchMap(()=> this.restClient.get('onet')).share();