@Override
	protected int crossover(final MSeq<G> that, final MSeq<G> other) {
		return (int) Randoms.indexes(RandomRegistry.random(), that.length(), 0.5)
			.peek(i -> crossover(that, other, i))
			.count();
	}
Return the <i>contiguity</i> value of the crossover.

@return the <i>contiguity</i> value of the crossover
jenetics.ext/src/main/java/io/jenetics/ext/SimulatedBinaryCrossover.java