@Nullable
  @Override
  public String getNodeName(int order) {
    return switch (myKind) {
      case PROTECTION_DOMAIN -> "<protection domain>";
      case INTERFACE -> "<interface>";
      case SIGNERS -> "<signers>";
      case CLASS_LOADER -> "<loader>";
      case CLASS -> "<class>";
      case STATIC_FIELD -> "<static field>";
      case SUPERCLASS -> "<superclass>";
      default -> "Referrer " + order;
    };
  }
@Nullable
  @Override
  public String getNodeName(int order)