Репозиторий темы/кожи Django [закрывается]

RootRef.child("Messages").child(messageReceiverID).child(messageSenderID).addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange (@NonNull DataSnapshot dataSnapshot){


        for (DataSnapshot ds : dataSnapshot.getChildren()) {
            String uid = ds.getKey();

            if (uid != null && isUserOnline.equals(true)) {
                RootRef.child("Messages").child(messageReceiverID).child(messageSenderID).child(uid).child("read").setValue(true);
                RootRef.child("Messages").child(messageSenderID).child(messageReceiverID).child(uid).child("read").setValue(true);
                Map messageTextBody = new HashMap();
                messageTextBody.replace("read", true);


            }

        }
       messageAdapter.notifyItemChanged(); // after end of loop using notifyItemChanged data
    }
}