src/vs/platform/extensionManagement/common/extensionsScannerService.ts/AbstractExtensionsScannerService/scanDefaultSystemExtensions
class AbstractExtensionsScannerService:	private async scanDefaultSystemExtensions(useCache: boolean, language: string | undefined): Promise<IRelaxedScannedExtension[]> {
		this.logService.trace('Started scanning system extensions');
		const extensionsScannerInput = await this.createExtensionScannerInput(this.systemExtensionsLocation, false, ExtensionType.System, true, language);
		const extensionsScanner = useCache && !extensionsScannerInput.devMode ? this.systemExtensionsCachedScanner : this.extensionsScanner;
		const result = await extensionsScanner.scanExtensions(extensionsScannerInput);
		this.logService.trace('Scanned system extensions:', result.length);
		return result;
	}