public static function FlushRewriteRules()
 {
     $_bIsFlushed = isset(self::$_bIsFlushed) ? self::$_bIsFlushed : false;
     if ($_bIsFlushed) {
         return;
     }
     flush_rewrite_rules();
     self::$_bIsFlushed = true;
 }
 public static function flushRewriteRules()
 {
     if (self::$_bIsFlushed) {
         return;
     }
     flush_rewrite_rules();
     self::$_bIsFlushed = true;
 }