addSubscriber method
Implementation
StreamSubscription<AlipayResp> addSubscriber(
void Function(AlipayResp event)? onData, {
Function? onError,
void Function()? onDone,
bool? cancelOnError,
}) {
_paySubs = AlipayKitPlatform.instance.payResp().listen(_listenPay);
return AlipayKitPlatform.instance.payResp().listen(onData,
onError: onError, onDone: onDone, cancelOnError: cancelOnError);
}