static int[] individuals(
		final int index,
		final int size,
		final int order,
		final RandomGenerator random
	) {
		final int[] ind = Subsets.next(random, size, order);

		// Find the correct slot for the "master" individual.
		// This prevents duplicate index entries.
		int i = 0;
		while (ind[i] < index && i < ind.length - 1) {
			++i;
		}
		ind[i] = index;

		return ind;
	}
Return the number of individuals involved in the
{@link #recombine(MSeq, int[], long)} step.

@return the number of individuals involved in the recombination step.
jenetics/src/main/java/io/jenetics/Recombinator.java