How to use the @react-native-firebase/admob.TestIds.BANNER function in @react-native-firebase/admob

//
  //     interstitialAd.load();
  //   }

  useEffect(() => {
    init().catch(console.error);
  }, []);

  return (
    <View
      style={{ flex: 1, justifyContent: 'center', flexDirection: 'column', alignItems: 'center' }}
    >
      <BannerAd
        size={firebase.admob.BannerAdSize.LARGE_BANNER}
        request={{}}
        unitId={TestIds.BANNER + '123'}
        onAdLoaded={() => console.log('loaded')}
        onAdFailedToLoad={e => console.log('failed to load', e)}
      />
    </View>
  );
}