src/vs/workbench/services/extensionManagement/common/extensionManagementService.ts/ExtensionManagementService/installVSIXInServer
class ExtensionManagementService:	protected installVSIXInServer(vsix: URI, server: IExtensionManagementServer, options: InstallVSIXOptions | undefined): Promise<ILocalExtension> {
		return server.extensionManagementService.install(vsix, options);
	}