RealmSwift: write following android query in swift

I want to convert android realm query into the swift realm query. Android query is Android :

realm.where(Message.class)
            .equalTo(Message.USER_ID, user_id)
            .beginGroup()
            .equalTo(Message.MESSAGE_STATUS, RECEIVED.ordinal())
            .or()
            .equalTo(Message.MESSAGE_STATUS, DELIVERY_SENT.ordinal())
            .endGroup()
            .count();

Swift:

What method can i use instead of beginGroup() and endGroup() method ? Can anyone convert this in realm swift ?