@AccessesPartialKey
  private static com.google.crypto.tink.aead.AesEaxKey createAesEaxKey(
      AesEaxParameters parameters, @Nullable Integer idRequirement)
      throws GeneralSecurityException {
    validate(parameters);
    return com.google.crypto.tink.aead.AesEaxKey.builder()
        .setParameters(parameters)
        .setIdRequirement(idRequirement)
        .setKeyBytes(SecretBytes.randomBytes(parameters.getKeySizeBytes()))
        .build();
  }
This key manager generates new {@code AesEaxKey} keys and produces new instances of {@code
AesEaxJce}.
java_src/src/main/java/com/google/crypto/tink/aead/AesEaxKeyManager.java