chromium/chromeos/components/test/data/onc/wifi_with_hidden_ssid.onc

{
  "GUID": "{77db0089-0bc8-4358-929c-123xcv}",
      "Type": "WiFi",
      "Name": "SomeWifi-XY",
      "WiFi": {
        "SSID": "SomeWifi-XY",
        "HexSSID": "536F6D65576966692D5859",
        "HiddenSSID": true,
        "Security": "None"
      },
}