Yii2.0 多表联查问题 [ 2.0 版本 ]

//控制器:
public function actionView($id)
{
    $orgs = OrgToLessons::find()->joinWith('treeNodes')->joinWith('lessons')->where(['lessons.id' => $id,'tree_type_id'=>21])->all();

    var_dump($orgs);

    return $this->render('view', [
        'model' => $this->findModel($id),
    ]);
}

//OrgToLessons模型：
public function getLessons(){

    return $this->hasMany(Lessons::className(), ['id' => 'lesson_id']);
}

public function getTreeNodes(){
    return $this->hasMany(TreeNode::className(), ['kid' => 'org_id']);
}

怎么取得TreeNode模型的数据？