如何记录rxjs observable和operator名称？

import { tap } from 'rxjs/operators';
import { Observable } from 'rxjs';

const source$ = new Observable<number>(observer => {
  observer.next(1);
  observer.next(2);
  observer.next(3);
  observer.complete();
}).pipe(
  tap({
    next: () => console.log('Operator: tap'),
    complete: () => console.log('Operator: tap complete')
  })
);

source$.subscribe({
  next: value => console.log('Observable: source$', value),
  complete: () => console.log('Observable: source$ complete')
});

Operator: tap
Observable: source$ 1
Observable: source$ 2
Observable: source$ 3
Operator: tap complete
Observable: source$ complete