@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Maybe<T> fromCallable(@NonNull final Callable<? extends T> callable) {
        ObjectHelper.requireNonNull(callable, "callable is null");
        return RxJavaPlugins.onAssembly(new MaybeFromCallable<T>(callable));
    }