src/vs/workbench/contrib/extensions/browser/extensionsQuickAccess.ts/InstallExtensionQuickAccessProvider/installExtension
class InstallExtensionQuickAccessProvider:	private async installExtension(extension: IGalleryExtension, name: string): Promise<void> {
		try {
			await openExtensionsViewlet(this.paneCompositeService, `@id:${name}`);
			await this.extensionsService.installFromGallery(extension);
		} catch (error) {
			this.notificationService.error(error);
		}
	}