src/vs/workbench/contrib/preferences/browser/settingsEditor2.ts/SyncControls/updateLastSyncedTime
class SyncControls:	private updateLastSyncedTime(): void {
		const last = this.userDataSyncService.lastSyncTime;
		let label: string;
		if (typeof last === 'number') {
			const d = fromNow(last, true);
			label = localize('lastSyncedLabel', "Last synced: {0}", d);
		} else {
			label = '';
		}

		this.lastSyncedLabel.textContent = label;
		this._onDidChangeLastSyncedLabel.fire(label);
	}