protected function _attachMethodHandler($eventName, $methodName, $priority = null, $numArgs = 1)
    {
        $methodName = $this->_normalizeString($methodName);
        $reflection = $this->_createReflectionMethod(get_class($this), $methodName);
        $handler    = $reflection->getClosure($this);

        $this->_addWpHook($eventName, $handler, $priority, $numArgs);
    }