ProGuard & AdWhirl

Compilation of an application with AdWhirl & ProGuard throws many warning, for all those AdWhirl adapter libraries not compiled with the application. I found multiple solutions online, some saying just ignore all the warning ProGuard throws:
-ignorewarnings

Don't use it - there's a better solution, ignoring only the problematic parts:
-dontwarn com.adwhirl.adapters.*

Here's the best solution for Proguard & AdWhirl as far as I know:

-dontwarn com.adwhirl.adapters.*

-keep class com.adwhirl.** { *;}
-keep public class com.adwhirl.adapters.AdMobAdapter {*;}
-keep public class com.adwhirl.adapters.ZestAdzAdapter {*;}
-keep public class com.adwhirl.adapters.MillennialAdapter {*;}
-keep public class com.admob.android.ads.** {*;}
-keep public class com.millennialmedia.android.** {*;}
-keep public class com.zestadz.android.** {*;}

-keep public class * extends Android.view.View {
public (android.content.Context);
public (android.content.Context, android.util.AttributeSet);
public (android.content.Context, android.util.AttributeSet, int);
public void set*(...);
}

-keepclassmembers class *{
public void *(android.view.View);
}