onDrop method
Implementation
@override
void onDrop(IDragDrop draggable, {Offset? dropSpot}) {
if (parent is PrototypeModel) {
(parent as PrototypeModel)
.onDragDrop(this, draggable, dropSpot: dropSpot);
} else {
DragDrop.onDrop(this, draggable, dropSpot: dropSpot);
}
}