How to use the apollo-language-server.DefaultEngineConfig.frontend function in apollo-language-server

];
      });
    } catch (error) {
      if (error.message.includes("/upgrade")) {
        this.exit(1);

        return;
      }
      throw error;
    }
    this.log(
      formatHumanReadable({
        implementingServices: taskOutput.implementingServices,
        graphName: taskOutput.config.name,
        frontendUrl:
          taskOutput.config.engine.frontend || DefaultEngineConfig.frontend
      })
    );
  }
}

})`;

            if (
              currentGraphInfo.implementingServices &&
              "services" in currentGraphInfo.implementingServices
            ) {
              consoleResult += ` is federated with ${chalk.cyan(
                `${currentGraphInfo.implementingServices.services.length} implementing services`
              )}.\n`;
              if (flags.verbose) {
                consoleResult += "\nSERVICE LIST\n";
                consoleResult += formatServiceListHumanReadable({
                  implementingServices: currentGraphInfo.implementingServices as any,
                  graphName: config.name,
                  frontendUrl:
                    config.engine.frontend || DefaultEngineConfig.frontend
                });
                consoleResult += "\n";
              }
              if (!currentGraphInfo.mostRecentCompositionPublish) {
                consoleResult += ` • No managed configuration has been pushed to the graph.\n`;
              } else {
                const compResult =
                  currentGraphInfo.mostRecentCompositionPublish;
                if (compResult.errors && compResult.errors.length) {
                  consoleResult +=
                    " • Current services fail to compose. Composition errors" +
                    " must be resolved before the gateway can be updated.\n";
                  const messages = [
                    ...compResult.errors.map(({ message }) => ({
                      type: chalk.red("Error"),
                      description: message