protected function asset($type)
    {
        $busters = $this->checkAndGetBusters();

        // get busters.json hash for item of this type mapped down to this type
        // only
        $bustersOfThisType = array();
        foreach ($busters as $key => $value) {
            if (strpos($key, $type) !== false) {
                $bustersOfThisType[$key] = $value;
            }
        }

        $busterStrings = $this->parseTags($bustersOfThisType, $type);

        return implode("\n", $busterStrings);
    }