protected OAuth2RefreshToken deserializeRefreshToken(ByteBuffer token) {
   return ByteBufferUtils.deserialize(token);
 }
 protected OAuth2Authentication deserializeAuthentication(ByteBuffer authentication) {
   return ByteBufferUtils.deserialize(authentication);
 }
 protected OAuth2AccessToken deserializeAccessToken(ByteBuffer token) {
   return ByteBufferUtils.deserialize(token);
 }