/**
  * 	column_ATT_email
  * @param \EE_Transaction $item
  * @return string|void
  */
 function column_ATT_email(EE_Transaction $item)
 {
     $attendee = $item->primary_registration()->get_first_related('Attendee');
     if (!empty($attendee)) {
         return '<a href="mailto:' . $attendee->get('ATT_email') . '">' . $attendee->get('ATT_email') . '</a>';
     } else {
         return $item->failed() || $item->is_abandoned() ? __('no contact record.', 'event_espresso') : __('No contact record, because the transaction was abandoned or the registration process failed.', 'event_espresso');
     }
 }