protected function getAssets($container, $type)
    {
        if ( ! isset($this->containers[$container])) {
            return [];
        }

        $container = $this->containers[$container];

        if ( ! isset($container->assets[$type]) || 0 === count($container->assets[$type])) {
            return [];
        }

        $assets = $container->assets[$type];

        $assets = $this->arrange($assets);

        return $assets;
    }