private function _allowedStyles(): array
    {
        $styles = [];
        $plugins = array_flip($this->_getRedactorConfig()['plugins'] ?? []);
        if (isset($plugins['alignment'])) {
            $styles['text-align'] = true;
        }
        if (isset($plugins['fontcolor'])) {
            $styles['color'] = true;
        }
        if (isset($plugins['fontfamily'])) {
            $styles['font-family'] = true;
        }
        if (isset($plugins['fontsize'])) {
            $styles['font-size'] = true;
        }
        return $styles;
    }