src/vs/workbench/services/notification/common/notificationService.ts/NotificationService/doNotDisturbMode
class NotificationService:	set doNotDisturbMode(enabled: boolean) {
		if (this._doNotDisturbMode === enabled) {
			return; // no change
		}

		this.storageService.store(NotificationService.DND_SETTINGS_KEY, enabled, StorageScope.APPLICATION, StorageTarget.MACHINE);
		this._doNotDisturbMode = enabled;

		// Toggle via filter
		this.updateDoNotDisturbFilters();

		// Events
		this._onDidChangeDoNotDisturbMode.fire();
	}