It took me quite a long time trying to find a solution, still no solution. Take the official example to illustrate:
https://opensource.appbase.io/reactive-manual/v3/advanced/reactivecomponent.html
I can add showFilter and filterLabel property to the parent ReactiveCompnent, however, after user picked the color, how to notify the SelectedFilters component about the value picked? how to get notified when user clear the color in the SelectedFilters?