[How to get the list of DOM objects from a timeline?]

When I create a timeline like this

            var tl = new TimelineMax({
                repeat : 5
            }).to(arm, duration, {
                scaleX : 1.05,
                scaleY : 0.95,
                transformOrigin : to
            }).to(leg, duration, {
                scaleX : 1,
                scaleY : 1,
                transformOrigin:to
            });

how can I get the objects from tl, that I passed to it when making it. Basically I am looking for something like:

tl.getElements();

which gives me

[arm, leg]

Does anyone know how to do this?

 

Thanks