getBanner method
Gets a banner with the provided placement ID if available in cache, otherwise returns null.
Implementation
Future<BrazeBanner?> getBanner(String placementId) {
final Map<String, dynamic> params = <String, dynamic>{
"placementId": placementId
};
return _channel.invokeMethod('getBanner', params).then<BrazeBanner?>(
(dynamic result) => result == null ? null : BrazeBanner(result));
}