Javascript fullcalendar version 1.6.4 annotation is not working as it is working in 1.5.4 version

Question

$("#calendarDiv").fullCalendar({
      header: {
          left: 'prev,today,next,agendaWeek,month',
          right: 'title'
      },
      customButtons: {
        myCustomButton: {
          text: 'custom!',
          click: function() {
            alert('clicked the custom button!');
          }
        }
      },
      columnFormat: {
          week: "ddd - d",
          viewRender: function(view, element) {
              
          }
      },
      titleFormat: {
          week: "MMMM yyyy"
      },
      firstHour: 9,
      firstDay: 1,
      height: 947,
      defaultView: 'agendaWeek',
      editable: false,
      selectable: true,
      selectHelper: true,
      slotMinutes: 15,
      allDaySlot: false,
      select: function(start, end, allDay) {
        let modifyParam = self.autoSelectStartTimeEndTime({'start': start,'end': end});
        self.commonService.setCalendarParam({'start': modifyParam.start,'end': modifyParam.end});
        self.preSelectCheck({'start': start,'end': end,'flag': 0});
      },
      eventClick: function(calEvent, jsEvent, view) {
        if (calEvent.title != 'Break Time') {
          self.commonService.setCalendarParam(calEvent);
          self.openTimesheetForm(calEvent)
        }
      },
      events: function(start, end, callback) { 
        self.getCalendarEvents({'start': start,'end': end},callback);
      },
      annotations: this.annotationData
});

annotation is not showing on calendar, is there any other way to showing it ?

I tried upgrading fullcalendar version 1.5.4 to 1.6.4 but only annotation is not working