An entry of PlacesModuleConfig.extraFeatureProps, either a fixed value written onto every place feature or a function computing one per place.
The place properties the callbacks receive. Name it on the config (PlacesModuleConfig<MyPlaceProps>) to have callbacks typed for the places you show.
PlacesModuleConfig<MyPlaceProps>
An entry of PlacesModuleConfig.extraFeatureProps, either a fixed value written onto every place feature or a function computing one per place.