@Override
 public Collection<VirtualFile> getDomFileCandidates(
     Class<? extends DomElement> rootElementClass,
     Project project,
     final GlobalSearchScope scope) {
   return FileBasedIndex.getInstance()
       .getContainingFiles(DomFileIndex.NAME, rootElementClass.getName(), scope);
 }
 public Collection<VirtualFile> getDomFileCandidates(
     Class<? extends DomElement> description, Project project) {
   return FileBasedIndex.getInstance()
       .getContainingFiles(
           DomFileIndex.NAME, description.getName(), GlobalSearchScope.allScope(project));
 }