src/vs/platform/userDataSync/common/userDataSyncIpc.ts/UserDataSyncMachinesServiceChannel/listen
class UserDataSyncMachinesServiceChannel:	listen(_: unknown, event: string): Event<any> {
		switch (event) {
			case 'onDidChange': return this.service.onDidChange;
		}
		throw new Error(`Event not found: ${event}`);
	}