public static ExhibitListState ReduceFetchExhibitListResultAction(ExhibitListState state, FetchExhibitListResultAction action) => new ExhibitListState( isLoading: false, exhibits: action.Exhibits );
public static ExhibitListState ReduceFetchExhibitListAction(ExhibitListState state, FetchExhibitListAction action) => new ExhibitListState( isLoading: true, exhibits: null);