@Override
	public void domainFolderAdded(DomainFolder folder) {
		DomainFolderNode domainFolderNode = findDomainFolderNode(folder, true);
		if (domainFolderNode != null) {
			return;
		}
		DomainFolder parentFolder = folder.getParent();
		DomainFolderNode folderNode = findDomainFolderNode(parentFolder, true);
		if (folderNode != null && folderNode.isLoaded()) {
			DomainFolderNode newNode =
				new DomainFolderNode(folder, folderNode.getDomainFileFilter());
			addNode(folderNode, newNode);
		}
	}
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