public static SerializableNode[] CreateSerializableNodes(ObjectElement tree)
{
var helper = new SerializerHelper();
// Get the list of objects contained in the Tree
helper.Explore( tree );
// Create the list of nodes
var objects = new SerializableNode[ helper.VisitedObjects.Count ];
int i=0;
foreach( var obj in helper.VisitedObjects.Values )
objects[i++] = obj;
return objects;
}