getCustomAd static method
Retrieves a custom ad by index, or a random custom ad, or null if none registered.
Implementation
static CustomAdModel? getCustomAd({int? index}) {
if (_customAds.isEmpty) return null;
if (index != null && index >= 0 && index < _customAds.length) {
return _customAds[index];
}
return _customAds[Random().nextInt(_customAds.length)];
}