49                 if (self::$isActive == null)
 
   52                         self::$isActive = $settings->get(
'enabled') == 
true;
 
   67                 if (self::$isReminderMailActive == null)
 
   70                         self::$isReminderMailActive = 
self::_isActive() && $settings->get(
'reminder_mail_enabled') == 
true;
 
   86                 if (self::$isSummaryMailActive == null)
 
   89                         self::$isSummaryMailActive = 
self::_isActive() && (int)$settings->get(
'summary_mail_enabled') == 1;