Robuta

https://developers.google.com/admob/android/reference/com/google/android/gms/ads/mediation/customevent/package-summary

https://developers.google.com/ad-manager/mobile-ads-sdk/android/reference/kotlin/com/google/android/gms/ads/mediation/customevent/CustomEvent?hl=ja

https://developers.google.com/admob/android/reference/com/google/android/gms/ads/mediation/customevent/CustomEvent?authuser=0&hl=hi