Live display JavaFX ObservableList or ReactFX LiveList

/**
 * An observable analogue of {@code Stream.map}. The output list is updated
 * whenever the input list changes.
 */
public static <T, R> ListBinding<R> map(
    ObservableList<? extends T> list,
    Function<T, ? extends R> mapper
);

      

        
        
        
      

    

I wrote the above JavaFX utility method that creates a live display ObservableList

by updating the display anytime the original list changes. Later I discovered ReactFX and its equivalentLiveList.map

public interface LiveList {
    default <F> LiveList<F> map(Function<? super E,? extends F> f);
}

      

        
        
        
      

    

Not wanting to reinvent the wheel again, I am now looking for a map function that returns a list of observables and automatically observes those observables. Basically flatMap

for the entire list. For example, if I had this:

<T, R> ListBinding<R> flatMap(
    ObservableList<? extends T> list,
    Function<T, ObservableValue<? extends R>> mapper
);

      

        
        
        
      

    

Then I could do this:

ObservableList<Button>  buttons;
ObservableList<Integer> widths = flatMap(buttons, Button::widthProperty);

      

        
        
        
      

    

This list widths

will grow and shrink if buttons are added or removed and will update if the width of the buttons changes.

Does such a feature exist in JavaFX or in ReactFX? Or something like that?