How to use the apollo-language-server.GraphQLClientProject function in apollo-language-server

const clientIdentity = {
      name: "Apollo CLI",
      version,
      referenceID
    };

    if (isServiceConfig(config)) {
      this.project = new GraphQLServiceProject({
        config,
        loadingHandler,
        rootURI,
        clientIdentity
      });
    } else if (isClientConfig(config)) {
      this.project = new GraphQLClientProject({
        config,
        loadingHandler,
        rootURI,
        clientIdentity
      });
    } else {
      throw new Error(
        "Unable to resolve project type. Please add either a client or service config. For more information, please refer to https://bit.ly/2ByILPj"
      );
    }

    this.ctx.project = this.project;
  }