yii\base\Model::setScenario PHP Method

    public function setScenario($value)
    {
        $this->_scenario = $value;
    }

 /**
  * Init.
  * @throws InvalidConfigException
  */
 public function init()
 {
     parent::init();
     if (!isset($this->id)) {
         throw new InvalidConfigException(get_class($this) . '::$id');
     }
     if (!$this->model instanceof Model) {
         throw new InvalidConfigException(get_class($this) . '::$model');
     }
     $this->model->setScenario('sync');
 }