protected function loadFields($type)
    {
        $options = $this->getUtils()->getOptions();

        $typeMap = $type . 'FieldMap';

        $fields = array();
        foreach ($this->$typeMap as $fieldName => $fieldValue) {
            if (isset($options[$fieldValue])) {
                $fields[$fieldName] = $options[$fieldValue];
            }
        }

        return $fields;
    }