@Internal
  public static boolean belongsToProject(@NotNull Project project, @NotNull VirtualFile file) {
    for (ExtraPlaceChecker checker : EP_NAME.getExtensionList()) {
      if (checker.accept(project, file)) {
        return true;
      }
    }
    if (!ProjectFileIndex.getInstance(project).isInContent(file)) {
      return false;
    }
    return true;
  }
@Internal
  public static boolean belongsToProject(@NotNull Project project, @NotNull VirtualFile file)