src/vs/platform/update/electron-main/updateService.darwin.ts/DarwinUpdateService/onUpdateDownloaded
class DarwinUpdateService:	private onUpdateDownloaded(update: IUpdate): void {
		if (this.state.type !== StateType.Downloading) {
			return;
		}

		type UpdateDownloadedClassification = {
			version: { classification: 'SystemMetaData', purpose: 'FeatureInsight' };
		};
		this.telemetryService.publicLog2<{ version: String }, UpdateDownloadedClassification>('update:downloaded', { version: update.version });

		this.setState(State.Ready(update));
	}