@Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
                          .add("alias", alias)
                          .add("delegate", delegate)
                          .toString();
    }
{@link X509ExtendedKeyManager} chooses the given alias for the server side.
dropwizard2/src/main/java/com/linecorp/armeria/dropwizard/CustomAliasX509ExtendedKeyManager.java