// ----------------------------------------------------------------------
public void ForEachRecursiveDepthFirst(iCS_EditorObject parent, Action <iCS_EditorObject> fnc)
{
DetectUndoRedo();
if (parent == null)
{
EditorObjects[0].ForEachRecursiveDepthFirst(child => fnc(child));
}
else
{
parent.ForEachRecursiveDepthFirst(child => fnc(child));
}
}