Xpressengine\Presenter\Html\Tags\CSSFile::load PHP Method

    public function load()
    {
        if ($this->loaded) {
            return $this;
        }
        if (static::$sorter === null || !static::$sorter instanceof Sorter) {
            static::$sorter = new Sorter();
        }
        $prev = null;
        foreach ((array) $this->files as $file) {
            // add file to output list
            static::$fileList = array_add(static::$fileList, $this->location, []);
            list($element, $position) = explode('.', $this->location);
            static::$fileList[$element][$position][$file] = $this;
            $added = false;
            // add before
            if (!empty($this->befores)) {
                $added = true;
                static::$sorter->add($file, Sorter::BEFORE, $this->befores);
            }
            if ($prev !== null) {
                static::$sorter->add($file, Sorter::BEFORE, $prev);
            }
            // remember prev file
            $prev = $file;
            // add after
            if (!empty($this->afters)) {
                $added = true;
                static::$sorter->add($file, Sorter::AFTER, $this->afters);
            }
            // add file to sorter
            if (!$added) {
                static::$sorter->add($file);
            }
        }
        // remove files from 'unloaded' list
        static::$unloaded = array_diff(static::$unloaded, (array) $this->files);
        // set loaded flag
        $this->loaded = true;
        return $this;
    }