/**
  * Gets our allowed payment methods, just as plain text separated by LF,
  * without the detailed description.
  * Returns an empty string if this seminar doesn't have any payment methods.
  *
  * @return string our payment methods as plain text (or '' if there
  *                is an error)
  */
 public function getPaymentMethodsPlainShort()
 {
     return parent::getPaymentMethodsPlainShort();
 }