public function actionUpdate($id)
 {
     $model = $this->findModel($id);
     $result = false;
     if (Yii::$app->request->post()) {
         $result = GivenTask::updateGivenTask(Yii::$app->request->post(), $model);
         $model = $this->findModel($id);
     }
     /*
             if ($model->load(Yii::$app->request->post()) && $model->save()) {
                 return $this->redirect(['view', 'id' => $model->id]);
             } else { */
     return $this->renderAjax('update', ['model' => $model, 'result' => $result]);
     //}
 }