code: @Pure
  	public DoubleProperty widthProperty() {
  		if (this.width == null) {
  			this.width = new ReadOnlyDoubleWrapper(this, MathFXAttributeNames.WIDTH);
  			this.width.bind(Bindings.subtract(maxXProperty(), minXProperty()));
  		}
  		return this.width;
  	}
docs: Replies the property that is the width of the box.
  
  @return the width property.