How can in retrive data from product in my orders child firebase databaseenter image description here

databaseReference2=FirebaseDatabase.getInstance().getReference().child("Orders").child(firebaseAuth.getCurrentUser().getUid()).child(ordersClassArrayList.get(position).getOrderId());
        orderItemClassArrayList=new ArrayList<>();
        ordersItemAdapter = new Orders_Item_Adapter(context,orderItemClassArrayList,databaseReference2,firebaseAuth);
        order_item_grid_view.setAdapter(ordersItemAdapter);
        databaseReference2.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
               /* for(DataSnapshot dataSnapshot:snapshot.getChildren()){
                    String orderid = dataSnapshot.child("OrderId").getValue(String.class);
                    Toast.makeText(context, ""+orderid, Toast.LENGTH_SHORT).show();
                   Order_Item_Class ordersitemClass = dataSnapshot.getValue(Order_Item_Class.class);
                    orderItemClassArrayList.add(ordersitemClass);
                }*/
                ordersItemAdapter.notifyDataSetChanged();
            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });