Method callSerially

CodenameOne/src/com/codename1/ui/Display.java:798–811

(Runnable r)

    /// - `r`: @param r runnable (NOT A THREAD!) that will be invoked on the EDT serial to
    /// the paint and key handling events
    public void callSerially(Runnable r) {
        // otherwise this will fail in an odd locaiton. Better it fails here...
        if (r == null) {
            throw new NullPointerException();
        }
        if (codenameOneRunning) {
            synchronized (lock) {
                scheduleSerialCall(isEnableAsyncStackTraces() ? new DebugRunnable(r) : r);
                lock.notifyAll();
            }
        } else {
            r.run();
        }
    }

    // We factor out the scheduling of a serial call so that we can
    // use the Schedule annotation for IntelliJ async debugging https://www.jetbrains.com/help/idea/debug-asynchronous-code.html