OEModule\OphCoMessaging\models\Element_OphCoMessaging_Message::model PHP Method

    public static function model($className = __CLASS__)
    {
        return parent::model($className);
    }

 public function actionDelete($id)
 {
     $criteria = new \CDbCriteria();
     $criteria->addCondition('id = :id');
     $criteria->params = array(':id' => $id);
     $message = Element_OphCoMessaging_Message::model()->find($criteria);
     $message->updateByPk($id, array('marked_as_read' => 1));
     $this->redirect(array('/OphCoMessaging/Inbox'));
 }