component-using-subtracker.ts

@Component({})
class NotLeakyComponent implements OnDestroy {

  private subTracker: SubscriptionTracker;

  ngOnInit() {
    const myTimer = timer(1,1);
    this.subTracker.subscribe(myTimer,
      () => console.log("timer called")
    );
  }
  // Just to satisfy the interface
  ngOnDestroy() {
  }
}