framework/base/Widget.php
public function getView()
    {
        if ($this->_view === null) {
            $this->_view = Yii::$app->getView();
        }

        return $this->_view;
    }
public function getView()
    {
        if ($this->_view === null) {
            $this->_view = Yii::$app->getView();
        }

        return $this->_view;
    }
Returns the view object that can be used to render views or view files.
The [[render()]] and [[renderFile()]] methods will use
this view object to implement the actual view rendering.
If not set, it will default to the "view" application component.
@return \yii\web\View the view object that can be used to render views or view files.