src/vs/workbench/services/extensionManagement/browser/builtinExtensionsScannerService.ts/BuiltinExtensionsScannerService/scanBuiltinExtensions
class BuiltinExtensionsScannerService:	async scanBuiltinExtensions(): Promise<IExtension[]> {
		if (isWeb) {
			return this.builtinExtensions;
		}
		throw new Error('not supported');
	}