public static int appendUserCert(@NotNull String alias, @NotNull String path) {
    try {
      List<X509Certificate> certs = SslUtil.loadCertificates(path);
      appendCertificates(alias, certs);
      return certs.size();
    }
    catch (Exception e) {
      throw new IllegalStateException(e);
    }
  }
public static int appendUserCert(@NotNull String alias, @NotNull String path)