code: public ListProperty<T> elementsProperty() {
  		if (this.elements == null) {
  			this.elements = new SimpleListProperty<>(this,
  					MathFXAttributeNames.ELEMENTS, new InternalObservableList<>());
  		}
  		return this.elements;
  	}
docs: Replies the property that contains all the shapes in this multishape.
  
  @return the elements property.