Method spawn

java/lib/src/main/java/io/github/ccxt/Exchange.java:1834–1836

Fire-and-forget async task (matches JS spawn() / C# Task.Run()). Used for fetching order book snapshots while WS loop continues.

(Runnable task)

     * Used for fetching order book snapshots while WS loop continues.
     */
    public void spawn(Runnable task) {
        VIRTUAL_EXECUTOR.execute(task);
    }

    /**
     * Schedule a method-name callback on the virtual executor after a delay.