src/vs/workbench/contrib/preferences/browser/settingsTree.ts/SyncSettingAction/constructor
class SyncSettingAction:	constructor(
		private readonly setting: ISetting,
		@IConfigurationService private readonly configService: IConfigurationService,
	) {
		super(SyncSettingAction.ID, SyncSettingAction.LABEL);
		this._register(Event.filter(configService.onDidChangeConfiguration, e => e.affectsConfiguration('settingsSync.ignoredSettings'))(() => this.update()));
		this.update();
	}