public function active(bool $slugify = true): array
    {
        global $blog_id; // Blog ID.

        $cache_key = '_'.(int) $blog_id.(int) $slugify;

        if (isset(static::$cache[__FUNCTION__][$cache_key])) {
            return static::$cache[__FUNCTION__][$cache_key];
        }
        $active = get_option('active_plugins');
        $active = is_array($active) ? $active : [];

        if ($slugify) { // Slugs w/ basename keys.
            $active = $this->s::pluginSlugs($active);
        }
        return static::$cache[__FUNCTION__][$cache_key] = $active;
    }