public NodeModel beginPathElement(int level) {
		return relativeNode(commonAncestor, beginPath, level);
	}
@Test
	public void beginPathElement(){
		final NodeModel parent = root();
		final NodeModel node1 = new NodeModel("node1", map);
		parent.insert(node1);
		final NodeModel node2 = new NodeModel("node2", map);
		parent.insert(node2);
		final NodeRelativePath nodeRelativePath = new NodeRelativePath(node1, node2);
		assertThat(nodeRelativePath.beginPathElement(1), equalTo(node1));
	}