@Override
	public void domainFolderRemoved(DomainFolder parent, String name) {
		updateFolderNode(parent);

		ArrayList<String> folderPath = new ArrayList<String>();
		getFolderPath(parent, folderPath);
		folderPath.add(name);

		DomainFolderNode folderNode = findDomainFolderNode(folderPath, true);
		if (folderNode != null) {
			folderNode.getParent().removeNode(folderNode);
		}
	}
Class to handle changes when a domain folder changes; updates the
tree model to reflect added/removed/renamed nodes.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/datatree/ChangeManager.java