GoogleMobileAds Framework Reference

GADAdapterInitializationState

NS_ENUM(NSInteger, GADAdapterInitializationState) {
  /// The mediation adapter is less likely to fill ad requests.
  GADAdapterInitializationStateNotReady = 0,
  /// The mediation adapter is ready to service ad requests.
  GADAdapterInitializationStateReady = 1
}

Undocumented