Firebase Realtime database getvalue() not mapping the object

Question

This is my firebase chat structure(see image below). I want to get only amitpal_name value not the others but this method fetching me all the values
I had also use this

Answer 1

DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("ChatMessage" ).child( "msg").child("amitpal_name");
    ref.addValueEventListener(new ValueEventListener() {
    @SuppressLint("SetTextI18n")
    @Override
    public void onDataChange ( @NonNull final DataSnapshot dataSnapshot2){
    }
}