/**
* @return array
*/
public static function abWinnerCriteria()
{
if (!is_array(self::$abWinnerCriteria)) {
self::$abWinnerCriteria = array('open' => ts('Open'), 'unique_click' => ts('Total Unique Clicks'), 'link_click' => ts('Total Clicks on a particular link'));
}
return self::$abWinnerCriteria;
}
