Multiple actions based on success response

removeBurger$: Observable<any> = this.actions$

.ofType('[Menu Page] Add burger')

.switchMap((action: menuActions.AddBurger | details.AddBurger) => {
    const p = action.payload;

    return this.burgerService.addBurger(p.id)
    .mergeMap(res => [
        new burgers.Load(), // refresh burger list
        new burgers.BurgerAddSuccess('Burger was successfully added.')
    ])
    .catch(err => {
        return of(new burgers.AddBurgerFail(err.statusCode));
    });
}))