src/vs/platform/extensionManagement/node/extensionsScanner.ts/ExtensionsScanner/scanDefaultSystemExtensions
class ExtensionsScanner:	private async scanDefaultSystemExtensions(): Promise<ILocalExtension[]> {
		const result = await this.scanExtensionsInDir(this.systemExtensionsPath, ExtensionType.System);
		this.logService.trace('Scanned system extensions:', result.length);
		return result;
	}