How to use the @sentry/core.Dsn function in @sentry/core

protected _setupTransport(): Transport {
    if (!this._options.dsn) {
      // We return the noop transport here in case there is no Dsn.
      return super._setupTransport();
    }

    const dsn = new Dsn(this._options.dsn);

    const transportOptions: TransportOptions = {
      ...this._options.transportOptions,
      ...(this._options.httpProxy && { httpProxy: this._options.httpProxy }),
      ...(this._options.httpsProxy && { httpsProxy: this._options.httpsProxy }),
      ...(this._options.caCerts && { caCerts: this._options.caCerts }),
      dsn: this._options.dsn,
    };

    if (this._options.transport) {
      return new this._options.transport(transportOptions);
    }
    if (dsn.protocol === 'http') {
      return new HTTPTransport(transportOptions);
    }
    return new HTTPSTransport(transportOptions);