/**
  * Main cnRole Instance.
  *
  * Insures that only one instance of cnRole exists at any one time.
  *
  * @access public
  * @since 0.7.5
  * @return object cnRole
  */
 public static function getInstance()
 {
     if (!isset(self::$instance)) {
         /*
          * Initiate an instance of the class.
          */
         self::$instance = new self();
     }
     return self::$instance;
 }