default Path<T> parent() {
		return count() > 1 ? subPath(0, count() - 1) : null;
	}
Returns the <em>parent path</em>, or {@code null} if this
path has no parent.

@return a path representing the path's parent, or {@code null} if
        {@code this} path has no parent
jenetics.incubator/src/main/java/io/jenetics/incubator/util/Path.java