src/vs/workbench/services/extensions/electron-sandbox/cachedExtensionScanner.ts/CachedExtensionScanner/scanSingleExtension
class CachedExtensionScanner:	public async scanSingleExtension(extensionPath: string, isBuiltin: boolean): Promise<IExtensionDescription | null> {
		const scannedExtension = await this._extensionsScannerService.scanExistingExtension(URI.file(path.resolve(extensionPath)), isBuiltin ? ExtensionType.System : ExtensionType.User, { language: platform.language });
		return scannedExtension ? toExtensionDescription(scannedExtension, false) : null;
	}