public static function getConfiguredStyles($key, $default = null)
    {
        $instance = static::instance();

        $value = $instance->get($key);

        $defaultValue = $instance->getDefaultValue($key);

        if (is_array($value)) {
            $value = array_build($value, function ($key, $value) {
                return [array_get($value, 'class_name'), array_get($value, 'class_label')];
            });
        }

        return $value != $defaultValue ? $value : $default;
    }