How to use the @algolia/transporter.Call.Write function in @algolia/transporter

public constructor(options: SearchClientOptions & TransporterOptions) {
    this.appId = options.appId;
    this.transporter = new Transporter(options);
    this.transporter.setHosts(
      [
        { url: `${this.appId}-dsn.algolia.net`, accept: Call.Read },
        { url: `${this.appId}.algolia.net`, accept: Call.Write },
      ].concat(
        shuffle([
          { url: `${this.appId}-1.algolianet.com`, accept: Call.Any },
          { url: `${this.appId}-2.algolianet.com`, accept: Call.Any },
          { url: `${this.appId}-3.algolianet.com`, accept: Call.Any },
        ])
      )
    );

    const auth = new Auth(
      options.authMode !== undefined ? options.authMode : AuthMode.WithinHeaders,
      this.appId,
      options.apiKey
    );

    this.transporter.addHeaders({