public int[] end() {
		return end.value.clone();
	}
Return the last element according its <em>natural</em> order.
<p>
<b>Last element of KSubset[n=20, k=8]</b>
<pre>
[12, 13, 14, 15, 16, 17, 18, 19]
</pre>

@return the last element of the k-subset
jenetics.incubator/src/main/java/io/jenetics/incubator/combinatorial/KSubset.java