Method screenshot

CodenameOne/src/com/codename1/ui/Display.java:6755–6757

(SuccessCallback<Image> callback)

    /// - `callback`: will be invoked on the EDT with a screenshot
    ///
    public void screenshot(SuccessCallback<Image> callback) {
        impl.screenshot(callback);
    }

    /// Notifies the platform that push notification processing is complete.
    /// This is useful on iOS where the app is woken up in the background to handle