private function getAccountHolder(array $element)
    {
        $firstName = !empty($element['billing']['firstName']) ? $element['billing']['firstName'] : '';
        $lastName = !empty($element['billing']['lastName']) ? $element['billing']['lastName'] : '';

        return trim(sprintf('%s %s', $firstName, $lastName));
    }
private function getAccountHolder(array $element)
    {
        $firstName = !empty($element['billing']['firstName']) ? $element['billing']['firstName'] : '';
        $lastName = !empty($element['billing']['lastName']) ? $element['billing']['lastName'] : '';

        return trim(sprintf('%s %s', $firstName, $lastName));
    }
@param array $element

@return string