src/vs/platform/update/electron-main/abstractUpdateService.ts/AbstractUpdateService/downloadUpdate
class AbstractUpdateService:	async downloadUpdate(): Promise<void> {
		this.logService.trace('update#downloadUpdate, state = ', this.state.type);

		if (this.state.type !== StateType.AvailableForDownload) {
			return;
		}

		await this.doDownloadUpdate(this.state);
	}