anchor.diff:            floor: <%= element.floor %>,
             element_type_id: <%= element.element_type_id %>,
             modified: true,
  -          id: <%= element.id %>
  +          id: <%= element.id %>,
  +          element_type_name: "Wall"
           })
           .setCoords();
   
  
positive.code:             range_down_digits: this.range_down_digits,
              range_down_letters: this.range_down_letters
            })
          }
          return fabric.util.object.extend(toObject.call(this), opts);
        };
      })(fabric.Object.prototype.toObject);
  
negative.code:           left: this.x2,
            width: this.y1,
            height: this.y2
          };
  
          return fabric.util.object.extend(toObject.call(this), opts);
        }
  