private static function loadState()
 {
     // Checks if state information is in the session
     if (isset($_SESSION['DATA_CENTER_STATE'])) {
         // Load state from session
         self::$state = $_SESSION['DATA_CENTER_STATE'];
     } else {
         // Use fallbacks for expected values where possible
         self::$state['private']['last-page'] = $_SERVER['PHP_SELF'];
     }
 }