public Image getSnapshot(){
        String code= getBase64Image(nativeCanvas);
        if(code == null)
            return null;
        Image image = new Image(code);
        return image;
    }
public Image getSnapshot ( ) { String code = getBase64Image ( nativeCanvas ) ; if ( code == null ) return null ; Image image = new Image ( code ) ; return image ; }
Creates snapshot of current state of chart as image
@return Image object or null if Chart not rendered (or in progress)