@ApiStatus.Internal
  public static PsiFileSystemItem getOriginalFile(PsiFileSystemItem fileSystemItem) {
    final VirtualFile file = fileSystemItem.getVirtualFile();
    if (file != null && !file.isDirectory()) {
      final PsiManager psiManager = fileSystemItem.getManager();
      if (psiManager != null) {
        final PsiFile psiFile = psiManager.findFile(file);
        if (psiFile != null) {
          fileSystemItem = psiFile;
        }
      }
    }
    return fileSystemItem;
  }
@ApiStatus.Internal
  public static PsiFileSystemItem getOriginalFile(PsiFileSystemItem fileSystemItem)