Object is dropped event

GoJS
1

Hi,
There are many events about diagram. But I didn’t see the event that object is dropped from palette to diagram. Is there any event to catch it?
I drop the object to my diagram, then i operate my business logic, before the dropped node is created.

2

I found answer,

myDiagram.addDiagramListener(“ExternalObjectsDropped”, function (e) {

});