in src/main/scala/com/gu/liveappversions/android/UploadModels.scala [15:20]
def toTracks(beta: Boolean, production: Boolean): Set[Track] = (beta, production) match {
case (false, false) => Set.empty
case (true, false) => Set(Beta)
case (false, true) => Set(Production)
case (true, true) => Set(Beta, Production)
}