@Override
    public Class<Aead> getPrimitiveClass() {
      return Aead.class;
    }
A custom implementation of {@link com.google.crypto.tink.KeyManager} for AES GCM 128.

<p>It only implements the methods of the KeyManager interface that are needed.
java_src/src/test/java/com/google/crypto/tink/custom/CustomAeadKeyManagerTest.java