public WebSocketServiceBuilder serviceOptions(ServiceOptions serviceOptions) {
        requireNonNull(serviceOptions, "serviceOptions");
        this.serviceOptions = serviceOptions;
        return this;
    }
Sets the {@link ServiceOptions} for the {@link WebSocketService}.
If not set, {@link WebSocketService#options()} is used.
core/src/main/java/com/linecorp/armeria/server/websocket/WebSocketServiceBuilder.java