@Test public void testToVoid() { Void collect = Stream.of(1, 2, 3).collect(CollectorsEx.toVoid()); assertNull(collect); }
@SuppressWarnings("unchecked") public static <T> Collector<T, Void, Void> toVoid() { return (Collector<T, Void, Void>) TO_VOID; }
CollectorsEx { @SuppressWarnings("unchecked") public static <T> Collector<T, Void, Void> toVoid() { return (Collector<T, Void, Void>) TO_VOID; } }
CollectorsEx { @SuppressWarnings("unchecked") public static <T> Collector<T, Void, Void> toVoid() { return (Collector<T, Void, Void>) TO_VOID; }  }
CollectorsEx { @SuppressWarnings("unchecked") public static <T> Collector<T, Void, Void> toVoid() { return (Collector<T, Void, Void>) TO_VOID; }  @SuppressWarnings("unchecked") static Collector<T, Void, Void> toVoid(); static Collector<T, Ref<T>, T> toFirst(); static Collector<T, Ref<T>, T> toLast(); static Collector<T, RefBoolean, Boolean> toAll(Predicate<? super T> predicate); static Collector<Boolean, RefBoolean, Boolean> toAll(); static Collector<T, RefBoolean, Boolean> toAny(Predicate<T> predicate); static Collector<Boolean, RefBoolean, Boolean> toAny(); static Collector<T, RefBoolean, Boolean> toNone(Predicate<T> predicate); static Collector<Boolean, RefBoolean, Boolean> toNone(); static BinaryOperator<T> throwingMerger(); static Collector<Entry<K, V>, ?, Map<K, V>> toMap(); static Collector<T, ?, Map<K, Set<V>>> toMultimap(Function<? super T, ? extends K> keyMapper,
			Function<? super T, ? extends V> valueMapper); }
CollectorsEx { @SuppressWarnings("unchecked") public static <T> Collector<T, Void, Void> toVoid() { return (Collector<T, Void, Void>) TO_VOID; }  @SuppressWarnings("unchecked") static Collector<T, Void, Void> toVoid(); static Collector<T, Ref<T>, T> toFirst(); static Collector<T, Ref<T>, T> toLast(); static Collector<T, RefBoolean, Boolean> toAll(Predicate<? super T> predicate); static Collector<Boolean, RefBoolean, Boolean> toAll(); static Collector<T, RefBoolean, Boolean> toAny(Predicate<T> predicate); static Collector<Boolean, RefBoolean, Boolean> toAny(); static Collector<T, RefBoolean, Boolean> toNone(Predicate<T> predicate); static Collector<Boolean, RefBoolean, Boolean> toNone(); static BinaryOperator<T> throwingMerger(); static Collector<Entry<K, V>, ?, Map<K, V>> toMap(); static Collector<T, ?, Map<K, Set<V>>> toMultimap(Function<? super T, ? extends K> keyMapper,
			Function<? super T, ? extends V> valueMapper); static final Collector<Object, Void, Void> TO_VOID; }