/**
* Returns the requested field from the given registration. If the field is a DateTime object,
* a formatted date string is returned
*
* @param \DERHANSEN\SfEventMgt\Domain\Model\Registration $registration
* @param string $field
* @return string
*/
protected function getFieldValue($registration, $field)
{
$value = $registration->_getCleanProperty($field);
if ($value instanceof \DateTime) {
$value = $value->format('d.m.Y');
}
return $value;
}