src/vs/workbench/browser/parts/notifications/notificationsList.ts/NotificationsList/show
class NotificationsList:	show(focus?: boolean): void {
		if (this.isVisible) {
			if (focus) {
				const list = assertIsDefined(this.list);
				list.domFocus();
			}

			return; // already visible
		}

		// Lazily create if showing for the first time
		if (!this.list) {
			this.createNotificationsList();
		}

		// Make visible
		this.isVisible = true;

		// Focus
		if (focus) {
			const list = assertIsDefined(this.list);
			list.domFocus();
		}
	}