@Override
	public void add(Object contextObj, Object data, DataFlavor flavor) {
		if (curService != null) {
			DataType dt = (DataType)data;
			curService.createData(dt, (ListingActionContext) contextObj, true, true);
		}
	}
@see ghidra.app.util.ProgramDropProvider#isDropOk(java.lang.Object, java.awt.dnd.DropTargetDragEvent)
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/util/DataDropOnBrowserHandler.java