@Override
  public PsiClass findClass(final @NotNull String qualifiedName, @NotNull GlobalSearchScope scope) {
    final Ref<PsiClass> result = Ref.create();
    processDirectories(StringUtil.getPackageName(qualifiedName), scope, dir -> {
      VirtualFile virtualFile = findChild(dir, StringUtil.getShortName(qualifiedName), myFileExtensions);
      final PsiFile file = virtualFile == null ? null : myManager.findFile(virtualFile);
      if (file instanceof PsiClassOwner) {
        final PsiClass[] classes = ((PsiClassOwner)file).getClasses();
        if (classes.length == 1) {
          result.set(classes[0]);
          return false;
        }
      }
      return true;
    });
    return result.get();
  }
@Override
  public PsiClass findClass(final @NotNull String qualifiedName, @NotNull GlobalSearchScope scope)