public void selectDomainFiles(Set<DomainFile> files) {
		List<TreePath> treePaths = getTreePaths(files);
		tree.expandAndSelectPaths(treePaths);
	}
Select the root data folder (not root node in the tree which shows the project name).
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/datatree/ProjectDataTreePanel.java