I would like to add a mouseDrop method to my node template and know 2 things when that drop method is called: what was dropped and what it was dropped on. for the latter, I mean what specific instance of the template including any information that I may have added to the node when I created the graph model. I am passed 2 arguments. I expect that one is an event and one is the dropped object. Is the item dropped upon buried somewhere in the event?