src/vs/workbench/services/notification/common/notificationService.ts/NotificationService/updateDoNotDisturbFilters
class NotificationService:	private updateDoNotDisturbFilters(): void {
		let filter: NotificationsFilter;
		if (this._doNotDisturbMode) {
			filter = NotificationsFilter.ERROR;
		} else {
			filter = NotificationsFilter.OFF;
		}

		this.model.setFilter(filter);
	}