@Deprecated
  public static EciesAeadHkdfPrivateKey createEciesAeadHkdfPrivKey(
      EciesAeadHkdfPublicKey pubKey, byte[] privKeyValue) throws Exception {
    final int version = 0;
    return EciesAeadHkdfPrivateKey.newBuilder()
        .setVersion(version)
        .setPublicKey(pubKey)
        .setKeyValue(ByteString.copyFrom(privKeyValue))
        .build();
  }
@return a {@code KeyData} containing a {@code EciesAeadHkdfPrivateKey} with the specified key
    material and parameters.
@deprecated Do not use this function
java_src/src/main/java/com/google/crypto/tink/testing/TestUtil.java