anchor.diff:    var inventory_units = _.where(shipment.inventory_units, {variant_id: variant_id});
   
     if (quantity == 0 && inventory_units.length == shipment.inventory_units.length) {
  -    showAlert(t("js.admin.orders.cannot_remove_last_item"));
  +    ofnAlert(t("js.admin.orders.cannot_remove_last_item"));
       return;
     }
   
  
positive.code: // variant autocompletion
  
  $(document).ready(function() {
  
    if ($('#variant_autocomplete_template').length > 0) {
      window.variantTemplate = Handlebars.compile($('#variant_autocomplete_template').text());
  
negative.code:   url += '.json';
  
    if (new_quantity == 0) {
      ofnAlert(t("js.admin.orders.quantity_unchanged"));
    } else {
      $.ajax({
        type: "PUT",
  