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@override
void initState() {
  super.initState();

  // Create a ConsentRequestParameters object.
  final params = ConsentRequestParameters();

  // Request an update to consent information on every app launch.
  ConsentInformation.instance.requestConsentInfoUpdate(
    params,
    () async {
      ConsentForm.loadAndShowConsentFormIfRequired((loadAndShowError) {
        if (loadAndShowError != null) {
          // Consent gathering failed.
        }

        // Consent has been gathered.
      });
    },
    (FormError error) {
      // Handle the error.
    },
  );
}

/// Helper variable to determine if the privacy options entry point is required.
Future<bool> isPrivacyOptionsRequired() async {
  return await ConsentInformation.instance
      .getPrivacyOptionsRequirementStatus() ==
      PrivacyOptionsRequirementStatus.required;
}

ConsentInformation.instance.requestConsentInfoUpdate(
  params,
  () async {
    ConsentForm.loadAndShowConsentFormIfRequired((loadAndShowError) {
      if (loadAndShowError != null) {
        // Consent gathering failed.
      }

      // Consent has been gathered.

      // Redraw the app bar actions if a privacy options entry point is required.
      if (await isPrivacyOptionsRequired()) {
        setState(() {
          _isPrivacyOptionsRequired = true;
        });
      }
    });
  },
  // ...

ConsentForm.showPrivacyOptionsForm((formError) {
  if (formError != null) {
    debugPrint("${formError.errorCode}: ${formError.message}");
  }
});

ConsentInformation.instance.requestConsentInfoUpdate(
  params,
  () async {
    ConsentForm.loadAndShowConsentFormIfRequired((loadAndShowError) {
      if (loadAndShowError != null) {
        // Consent gathering failed.
      }

      // Consent has been gathered.
      if (await ConsentInformation.instance.canRequestAds()) {
        _initializeGoogleMobileAdsSDK()
      }
      // ...
    });
  },
  (FormError error) {},
);

// Check if you can initialize the Mobile Ads SDK in parallel while
// checking for new consent information. Consent obtained in the
// previous session can be used to request ads.
if (await ConsentInformation.instance.canRequestAds()) {
  _initializeGoogleMobileAdsSDK()
}

void _initializeGoogleMobileAdsSDK() async {
  if (_isMobileAdsInitializeCalled) {
    return;
  }

  _isMobileAdsInitializeCalled = true;

  // Initialize the Mobile Ads SDK.
  MobileAds.instance.initialize();

  // Load an ad.
  _loadAd();
}

ConsentDebugSettings debugSettings = ConsentDebugSettings(
  debugGeography: DebugGeography.debugGeographyEea,
  testIdentifiers: ["TEST-DEVICE-HASHED-ID"],
);

ConsentRequestParameters params =
    ConsentRequestParameters(consentDebugSettings: debugSettings);

ConsentInformation.instance.requestConsentInfoUpdate(params, () async {
  // ...
};

ConsentInformation.instance.reset();