Craft\MinimeeService::setType PHP Method

    protected function setType($type)
    {
        if ($type !== MinimeeType::Css && $type !== MinimeeType::Js) {
            throw new Minimee_WarningException(Craft::t('Attempting to set an unknown type `' . $type . '`.'));
        }
        $this->_type = $type;
        return $this;
    }