@Override
    protected FilterResults performFiltering(CharSequence constraint) {
        FilterResults results = new FilterResults();

        //CHECK CONSTRAINT VALIDITY
         if(constraint != null && constraint.length() > 0)
         {
             //CHANGE TO UPPER
             constraint = constraint.toString().toUpperCase();
             //STORE OUR FILTERED ORDER
             ArrayList<OrderModel> filteredOrder = new ArrayList<>();

             for (int i=0; i<filteredOrder.size(); i++) {
                 // CHECK
                 if (filterList.get(i).getCustomerName().toUpperCase().contains(constraint)) {
                     //ADD CUSTOMER TO FILTERED ORDERS
                    filteredOrder.add(filterList.get(i));
                    Log.d("Testing.....","You are here --->" + filteredOrder);
                 }
             }
             results.count = filteredOrder.size();
             results.values = filteredOrder;
         } else {
             results.count = filterList.size();
             results.values = filterList;
         }
        return results;
    }