How to use the calendar-utils.getWeekViewEventOffset function in calendar-utils

row: newEvents.map(function(dayEvent) {
          var event = dayEvent.event;
          return {
            event: event,
            top: dayEvent.top,
            offset: calendarUtils.getWeekViewEventOffset({
              event: {
                start: event.startsAt,
                end: event.endsAt
              },
              startOfWeek: moment(viewDate).startOf('week').toDate()
            })
          };
        })
      }];