code: protected ReadOnlyListWrapper<Point3ifx> innerCoordinatesProperty() {
  		if (this.coords == null) {
  			this.coords = new ReadOnlyListWrapper<>(this, MathFXAttributeNames.COORDINATES,
  					FXCollections.observableList(new ArrayList<>()));
  		}
  		return this.coords;
  	}
docs: Replies the private coordinates property.
  
  @return the private coordinates property.