I usually try to un-parent before duplicating a scenegraph node in order to use it under other branch. An example would be:
Note that fxsampleUI is a NB generated out of the "fasample.fxz" file.

var scene = Scene{}
var fxsample:fxsampleUI = fxsampleUI{}

if(fxsample.background.parent instanceof Group) {
   delete fxsample.background from (fxsample.background.parent as Group).content;
   scene.content = fxsample.background;
} else {
   scene.content = Duplicator.duplicate(fxsample.background);
}

This doesn't give good user experience. Unparenting is cumbersome whenever I want to use a node. So we need an easier way.
If it can be completely automatic, that will be ideal. If this is not a good idea, could we add an "unparent()" function to Node.fx?