yii2tech\admin\grid\ActionColumn::createUrl PHP Method

    public function createUrl($action, $model, $key, $index)
    {
        if (is_callable($this->urlCreator)) {
            return call_user_func($this->urlCreator, $action, $model, $key, $index);
        } else {
            $params = is_array($key) ? $key : ['id' => (string) $key];
            $params[0] = $this->controller ? $this->controller . '/' . $action : $action;
            $params = $params + Yii::$app->request->getQueryParams();
            // preserve numeric keys
            return Url::toRoute($params);
        }
    }