Fullcalendar , simple integration

I’m having a bit of a problem with this. I was trying to adapt the geosearch map thingy to use with vue fullcalendar. The full-calendar component is inside the and I’m passing on the events as such <FullCalendar

The fullcalendar is connected with this I think mixins: [createWidgetMixin({ connector: connectGeoSearch })],
So far this works with the filtering also because I also have the date property on the results. But I need a way to modify the state.items to add more properties to it such as editable : false if the date is in the past. How can I do this ? Is there a way to customize the output of either hits or state.items before sending it to fullcalendar ? Any help is appreciated. Thanks