src/vs/workbench/services/extensionManagement/browser/webExtensionsScannerService.ts/WebExtensionsScannerService/addExtension
class WebExtensionsScannerService:	async addExtension(location: URI, metadata?: Metadata): Promise<IExtension> {
		const webExtension = await this.toWebExtension(location, undefined, undefined, undefined, undefined, undefined, metadata);
		return this.addWebExtension(webExtension);
	}