yii\debug\Module::beforeAction PHP Method

    public function beforeAction($action)
    {
        if (!$this->enableDebugLogs) {
            foreach (Yii::$app->getLog()->targets as $target) {
                $target->enabled = false;
            }
        }
        if (!parent::beforeAction($action)) {
            return false;
        }
        // do not display debug toolbar when in debug view mode
        Yii::$app->getView()->off(View::EVENT_END_BODY, [$this, 'renderToolbar']);
        Yii::$app->getResponse()->off(Response::EVENT_AFTER_PREPARE, [$this, 'setDebugHeaders']);
        if ($this->checkAccess()) {
            $this->resetGlobalSettings();
            return true;
        } elseif ($action->id === 'toolbar') {
            // Accessing toolbar remotely is normal. Do not throw exception.
            return false;
        } else {
            throw new ForbiddenHttpException('You are not allowed to access this page.');
        }
    }