@Nullable
  @NlsSafe
  public static String getPluginId(Project project, VirtualFile file) {
    final Set<String> keys = FileBasedIndex.getInstance().getFileData(NAME, file, project).keySet();
    return findPluginId(keys);
  }
@Nullable
  @NlsSafe
  public static String getPluginId(Project project, VirtualFile file)