@Override
    public FeedClientBuilderImpl setCertificate(Path certificatePemFile, Path privateKeyPemFile) {
        this.certificateFile = certificatePemFile;
        this.privateKeyFile = privateKeyPemFile;
        return this;
    }
Sets path to client SSL certificate/key PEM files
vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/FeedClientBuilderImpl.java