this.hold(
  of(null).pipe(switchMap(() => throwError("error"))),
  value => {
    console.log(value);
  }
);

hold<S>(
  obsOrObsWithSideEffect: Observable<S>,
  sideEffectFn?: (arg: S) => void
): void {
  const sideEffect = obsOrObsWithSideEffect.pipe(catchError(e => {
    console.error(e)
    return EMPTY
  }))
  if (typeof sideEffectFn === 'function') {
    this.effectObservable.nextEffectObservable(
      sideEffect.pipe(tap(sideEffectFn))
    );
    return;
  }
  this.effectObservable.nextEffectObservable(sideEffect);
}