anchor.diff:            id: this.id,
             floor: this.floor,
             element_type_id: this.element_type_id,
  -          modified: this.modified
  +          modified: this.modified,
  +          element_type_name: this.element_type_name
           };
   
  -        if (this.element_type_id == 11) {
  +        <% if element.element_type.name == "Shelf" %>
             $.extend(opts, {
               classification: this.classification,
               identifier: this.identifier,
  
positive.code:             floor: <%= @floor %>,
              element_type_id: parseInt(assetId),
              modified: true,
              id: null
            })
            .setCoords();
  
  
negative.code:             range_down_digits: this.range_down_digits,
              range_down_letters: this.range_down_letters
            })
          <% end %>
          return fabric.util.object.extend(toObject.call(this), opts);
        };
      })(fabric.Object.prototype.toObject);
  