@Override
    public String toString() {
        final ToStringHelper helper = MoreObjects.toStringHelper(this).omitNullValues();
        helper.add("options", options);

        if (maxNumEventLoopsPerHttp1Endpoint > 0) {
            helper.add("maxNumEventLoopsPerHttp1Endpoint", maxNumEventLoopsPerHttp1Endpoint);
        }
        if (maxNumEventLoopsPerEndpoint > 0) {
            helper.add("maxNumEventLoopsPerEndpoint", maxNumEventLoopsPerEndpoint);
        }
        if (!maxNumEventLoopsFunctions.isEmpty()) {
            helper.add("maxNumEventLoopsFunctions", maxNumEventLoopsFunctions);
        }

        return helper.toString();
    }
Returns a newly-created {@link ClientFactory} based on the properties of this builder.
core/src/main/java/com/linecorp/armeria/client/ClientFactoryBuilder.java