if(nodes.size() == 0) throw Exception("TemplateTree::rootAt(): Node with id not found.");
if(nodes.size() == 0) throw NodeNotFoundException("TemplateTree::rootAt(): Node with id not found.", "" + id);
		const N * getNode(int id) const throw (Exception)		{			vector<const N *> nodes = TreeTools::searchNodeWithId<const N>(*_root, id);			if(nodes.size() > 1) throw Exception("TemplateTree::rootAt(): Non-unique id!");			if(nodes.size() == 0) throw Exception("TemplateTree::rootAt(): Node with id not found.");			return nodes[0];		}