static function getRecipientListing($mappingID, $recipientType)
 {
     $options = array();
     if (!$mappingID || !$recipientType) {
         return $options;
     }
     $mapping = self::getMapping($mappingID);
     switch ($mapping['entity']) {
         case 'civicrm_participant':
             $eventContacts = CRM_Core_PseudoConstant::eventContacts('name');
             if (!CRM_Utils_Array::value($recipientType, $eventContacts)) {
                 return $options;
             }
             if ($eventContacts[$recipientType] == 'Participant Role') {
                 $options = CRM_Event_PseudoConstant::participantRole();
             }
             break;
     }
     return $options;
 }
 /**
  * Get all Event Contacts
  *
  * The static array eventContacts is returned
  *
  * @access public
  * @static
  *
  * @param string $column db column name/label.
  *
  * @return array - array reference of all  event Contacts
  *
  */
 public static function &eventContacts($column = 'label')
 {
     if (!self::$eventContacts) {
         self::$eventContacts = CRM_Core_OptionGroup::values('event_contacts', FALSE, FALSE, FALSE, NULL, $column);
     }
     return self::$eventContacts;
 }