private void addToView(ProgramTreeActionContext context) {
		ProgramDnDTree tree = context.getTree();
		TreePath[] paths = context.getSelectionPaths();
		for (TreePath path : paths) {
			updateViewList(tree, path);
		}
		tree.fireTreeViewChanged();
	}
Clear the system clipboard if there is tree transferable data on it.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/programtree/ProgramTreeActionManager.java