How do I use proguard with 3DR Services?

android-proguard,dronekit-android

I am not sure it is the best solution, but I could make it work using the following rules: -dontwarn com.google.android.gms.common.api.* -dontwarn com.google.android.gms.common.ConnectionResult -dontwarn com.google.android.gms.common.GooglePlayServicesUtil -keep class com.o3dr.** { *; } ...