src/vs/workbench/browser/parts/notifications/notificationsCenter.ts/NotificationsCenter/getKeybindingLabel
class NotificationsCenter:	private getKeybindingLabel(action: IAction): string | null {
		const keybinding = this.keybindingService.lookupKeybinding(action.id);

		return keybinding ? keybinding.getLabel() : null;
	}