@Override
    public FeedClient build() {
        try {
            validateConfiguration();
            return new HttpFeedClient(this);
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
Constructs instance of {@link ai.vespa.feed.client.FeedClient} from builder configuration
vespa-feed-client/src/main/java/ai/vespa/feed/client/impl/FeedClientBuilderImpl.java