}

    public static <K, V> StreamOf<Map.Entry<K, V>> stream(final Map<K, V> map) {
        return new StreamOf<>(() -> map != null ? map.entrySet().stream() : Collections.<K, V> emptyMap().entrySet().stream());
    }

    public static class StreamOf<T> {

        private final Supplier<Stream<T>> supplier;

        public StreamOf(final Supplier<Stream<T>> supplier) {