How to use the angular-calendar.DAYS_OF_WEEK.SATURDAY function in angular-calendar

useClass: CustomDateFormatter
    }
  ]
})
export class DemoComponent {
  view: CalendarView = CalendarView.Month;

  viewDate = new Date();

  events: CalendarEvent[] = [];

  locale: string = 'fr';

  weekStartsOn: number = DAYS_OF_WEEK.MONDAY;

  weekendDays: number[] = [DAYS_OF_WEEK.FRIDAY, DAYS_OF_WEEK.SATURDAY];

  CalendarView = CalendarView;

  setView(view: CalendarView) {
    this.view = view;
  }
}