@Deprecated
  public static KeyData createAesEaxKeyData(byte[] keyValue, int ivSizeInBytes)
      throws Exception {
    AesEaxKey keyProto =
        AesEaxKey.newBuilder()
            .setKeyValue(ByteString.copyFrom(keyValue))
            .setParams(AesEaxParams.newBuilder().setIvSize(ivSizeInBytes).build())
            .build();
    return createKeyData(keyProto, AeadConfig.AES_EAX_TYPE_URL, KeyData.KeyMaterialType.SYMMETRIC);
  }
@return a {@code KeyData} containing a {@code AesEaxKey}.
@deprecated DO not use this function.
java_src/src/main/java/com/google/crypto/tink/testing/TestUtil.java