public static function addCssStyle(&$options, $style, $overwrite = true)
    {
        if (!empty($options['style'])) {
            $oldStyle = static::cssStyleToArray($options['style']);
            $newStyle = is_array($style) ? $style : static::cssStyleToArray($style);
            if (!$overwrite) {
                foreach ($newStyle as $property => $value) {
                    if (isset($oldStyle[$property])) {
                        unset($newStyle[$property]);
                    }
                }
            }
            $style = static::cssStyleFromArray(array_merge($oldStyle, $newStyle));
        }
        $options['style'] = $style;
    }