/**
* @return array
*/
public static function abTestCriteria()
{
if (!is_array(self::$abTestCriteria)) {
self::$abTestCriteria = array('subject' => ts('Test different "Subject" lines'), 'from' => ts('Test different "From" lines'), 'full_email' => ts('Test entirely different emails'));
}
return self::$abTestCriteria;
}
