Inheritance: extends yii\base\Behavior
 public function behaviors()
 {
     return ArrayHelper::merge(parent::behaviors(), ['timestamp' => ['class' => TimestampBehavior::className(), 'attributes' => [ActiveRecord::EVENT_BEFORE_INSERT => ['created_at', 'updated_at'], ActiveRecord::EVENT_BEFORE_UPDATE => 'updated_at'], 'value' => function () {
         return time();
     }], 'base64encode' => ['class' => Base64EncodeBehavior::className(), 'attributes' => ['message']]]);
 }