-keep  class com.my.target.** { *; }
-keep  class com.mopub.MopubCustomParamsFactory**{ *; }
-keep  class com.mopub.mobileads.MyTargetMopubCustomEventInterstitial**{ *; }
-keep  class com.mopub.mobileads.MyTargetMopubCustomEventRewardedVideo**{ *; }
-keep  class com.mopub.nativeads.MyTargetCustomEventNative**{ *; }
-keep  class com.mopub.nativeads.MyTargetStaticNativeAd**{ *; }

-dontwarn com.mopub.MopubCustomParamsFactory**
-dontwarn com.mopub.mobileads.MyTargetMopubCustomEventInterstitial**
-dontwarn com.mopub.mobileads.MyTargetMopubCustomEventRewardedVideo**
-dontwarn com.mopub.nativeads.MyTargetCustomEventNative**
-dontwarn com.mopub.nativeads.MyTargetStaticNativeAd**