@Override
    public FeedClientBuilderImpl setHostnameVerifier(HostnameVerifier verifier) {
        this.hostnameVerifier = requireNonNull(verifier);
        return this;
    }
Sets {@link HostnameVerifier} instance (e.g for disabling default SSL hostname verification).
vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/FeedClientBuilderImpl.java