private static boolean isImagesInDirectory(VirtualFile dir) {
    ImageFileTypeManager typeManager = ImageFileTypeManager.getInstance();
    VirtualFile[] files = dir.getChildren();
    for (VirtualFile file : files) {
      if (file.isDirectory()) {
        // We can be sure for fast searching
        return true;
      }
      if (typeManager.isImage(file)) {
        return true;
      }
    }
    return false;
  }
private static boolean isImagesInDirectory(VirtualFile dir)