@Nonnull
	public static <T> ConsumerBuilder<T> consumer(Consumer<Consumer<T>> consumer) {
		return new ConsumerBuilder(consumer);
	}
@ Nonnull public static < T > ConsumerBuilder < T > consumer ( Consumer < Consumer < T > > consumer ) { return new ConsumerBuilder ( consumer ) ; }
One of ways of creating builder. This might be the only way (considering all _functional_ builders) that might be utilize to specify generic params only once.