-keep class com.mopub.mobileads.FeedAdMoPubAdapter { public *; }
-keep class com.mopub.mobileads.FeedAdMoPubAd { public *; }
-keep class com.mopub.mobileads.FeedAdMoPubInterstitialAd { public *; }
-keep class com.mopub.mobileads.FeedAdMoPubNativeAd { public *; }
-keep class com.mopub.mobileads.FeedAdMoPubNativeAdRenderer { public *; }