get fetchOptions() {
    let fetchOptions
    return (
      this.options.fetchOptions ??
      (() => {
        if (!fetchOptions) {
          fetchOptions = {
            headers: {
              accept:
                'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
              'accept-language': 'en-US,en;q=0.9',
              'cache-control': 'no-cache',
              'sec-ch-ua': '"Microsoft Edge";v="113", "Chromium";v="113", "Not-A.Brand";v="24"',
              'sec-ch-ua-arch': '"x86"',
              'sec-ch-ua-bitness': '"64"',
              'sec-ch-ua-full-version': '"113.0.1774.35"',
              'sec-ch-ua-full-version-list':
                '"Microsoft Edge";v="113.0.1774.35", "Chromium";v="113.0.5672.63", "Not-A.Brand";v="24.0.0.0"',
              'sec-ch-ua-mobile': '?0',
              'sec-ch-ua-model': '""',
              'sec-ch-ua-platform': '"Windows"',
              'sec-ch-ua-platform-version': '"11.0.0"',
              'sec-fetch-dest': 'iframe',
              'sec-fetch-mode': 'navigate',
              'sec-fetch-site': 'same-origin',
              cookie:
                this.options.cookies ||
                (this.options.userToken ? `_U=${this.options.userToken}` : undefined),
              pragma: 'no-cache',
              referer: 'https://www.bing.com/search?q=Bing+AI&showconv=1&FORM=hpcodx',
              'Referrer-Policy': 'origin-when-cross-origin',
              // Workaround for request being blocked due to geolocation
              ...(this.options.xForwardedFor
                ? { 'x-forwarded-for': this.options.xForwardedFor }
                : {}),
              'upgrade-insecure-requests': '1',
              'user-agent': this.options.ua,
              'x-edge-shopping-flag': '1',
            },
          }

          if (this.options.proxy) {
            // fetchOptions.dispatcher = new ProxyAgent(this.options.proxy);
          }
        }

        return fetchOptions
      })()
    )
  }
Get fetchOptions of BingImageCreator.
{Object} The fetch options used for BingImageCreator.