viewHolder.Delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String documentId=appointmentList.get(position);
                firebaseFirestore.collection("bookings")
                        .document(documentId)
                        .delete()
                        .addOnSuccessListener(new OnSuccessListener<Void>() {
                            @Override
                            public void onSuccess(Void aVoid) {
                                viewHolder.viewForeground.removeAllViews();
//                              task.getResult().getDocuments().remove(position;
                                notifyItemRemoved(position);

                            }
                        });
            }
        });