Method connect

java/lib/src/main/java/io/github/ccxt/ws/WsClient.java:250–261

Connect to the WebSocket server. Returns a future that completes when connected. If already connecting/connected, returns the existing future.

(int backoffDelay)

     * If already connecting/connected, returns the existing future.
     */
    public CompletableFuture<Boolean> connect(int backoffDelay) {
        if (this.startedConnecting.compareAndSet(false, true)) {
            if (backoffDelay > 0) {
                CompletableFuture.delayedExecutor(backoffDelay,
                        java.util.concurrent.TimeUnit.MILLISECONDS)
                        .execute(this::createConnection);
            } else {
                Exchange.VIRTUAL_EXECUTOR.execute(this::createConnection);
            }
        }
        return this.connected;
    }

    private void createConnection() {
        try {