why not using SimpleXmlElement when saving simulator document ?

[houcemL]

G6K/src/G6K/Model/Simulator.php

Line 3027 in 6ab4e0c

public function save($file) {

hello

First thank you for sharing this wonderfull and intelligent project !

I was reading the code and i'm wondering why you did not use a new SimpleXmlElement and so on for all childs .. to finaly generate the xml ? otherwise did you try to use some serialization components / libraries such as sf serialization or JMS ?