How I can find JTree node by VirtualFile and move node inside another.

I wanna find *.css files and move as child in *.styl. Like File Watcher do it.

In first step I:

Collection<VirtualFile> stylFile = FileBasedIndex.getInstance().getContainingFiles(FilenameIndex.NAME, "file.styl", GlobalSearchScope.allScope(project));
Collection<VirtualFile> cssFile = FileBasedIndex.getInstance().getContainingFiles(FilenameIndex.NAME, "file.css", GlobalSearchScope.allScope(project));

P.S. Project have one styl and css file now.

ProjectView projectView = ProjectView.getInstance(project);
AbstractProjectViewPane projectViewPane = projectView.getCurrentProjectViewPane();
if (projectViewPane == null) return;
JTree tree = projectViewPane.getTree();
TreeModel model = tree.getModel();

I don't now now how to find files and move it inside. And may be you know another right way.

Thanks!