@SafeVarargs
	public final TreeNode<T> attach(final T... children) {
		for (T child : children) {
			attach(TreeNode.of(child));
		}

		return this;
	}
Attaches the given {@code children} to {@code this} node.

@param children the children to attach to {@code this} node
@return {@code this} tree-node, for method chaining
@throws NullPointerException if the given {@code children} array is
        {@code null}
jenetics.ext/src/main/java/io/jenetics/ext/util/TreeNode.java