onDragObservable with BoundingBoxGizmo?

Questions
2

Well, figured out another way to do it:

    var dragobserver = new BABYLON.PointerDragBehavior();
    dragobserver.onDragObservable.add((event)=>{
      console.log("drag",meshid);
      console.log(event);
    })
    mesh.addBehavior(dragobserver);