dragging start
dragging done
// child.dropTarget.name
drop1
dragging start
dragging done
// child.dropTarget.name
TypeError: Error #1009: Cannot access a property or method of a null object reference. (accessing field: name)
	at MethodInfo-2()
dragging start
dragging done
// child.dropTarget.name
drop2
dragging start
dragging done
// child.dropTarget.name
drop3
dragging start
dragging done
// child.dropTarget.name
drop3
