@Override
  public @NotNull String buildErrorString(Object... infos) {
    final PsiClass parentInterface = (PsiClass)infos[0];
    final String interfaceName = parentInterface.getName();
    return InspectionGadgetsBundle.message(
      "inner.class.on.interface.problem.descriptor", interfaceName);
  }
@Override
  public @NotNull String buildErrorString(Object... infos)