src/vs/platform/userDataSync/common/userDataSyncServiceIpc.ts/UserDataSyncChannelClient/updateLastSyncTime
class UserDataSyncChannelClient:	private updateLastSyncTime(lastSyncTime: number): void {
		if (this._lastSyncTime !== lastSyncTime) {
			this._lastSyncTime = lastSyncTime;
			this._onDidChangeLastSyncTime.fire(lastSyncTime);
		}
	}