private static Collection<LocalChangeList> getChangeListsForRoot(
     ChangeListManager changeListManager, final FilePath dirPath) {
   Collection<Change> changes = changeListManager.getChangesIn(dirPath);
   Set<LocalChangeList> changeLists = new HashSet<LocalChangeList>();
   for (Change change : changes) {
     changeLists.add(changeListManager.getChangeList(change));
   }
   return changeLists;
 }