@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Single<T> doOnSuccess(final Consumer<? super T> onSuccess) {
        ObjectHelper.requireNonNull(onSuccess, "onSuccess is null");
        return RxJavaPlugins.onAssembly(new SingleDoOnSuccess<T>(this, onSuccess));
    }