Method empty

src/main/java/io/reactivex/rxjava3/core/Observable.java:1813–1819

Returns an Observable that emits no items to the Observer and immediately invokes its Observer#onComplete onComplete method. Scheduler:</

()

     * @see <a href="http://reactivex.io/documentation/operators/empty-never-throw.html">ReactiveX operators documentation: Empty</a>
     */
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    @SuppressWarnings("unchecked")
    @NonNull
    public static <@NonNull T> Observable<T> empty() {
        return RxJavaPlugins.onAssembly((Observable<T>) ObservableEmpty.INSTANCE);
    }

    /**
     * Returns an {@code Observable} that invokes an {@link Observer}'s {@link Observer#onError onError} method when the