in src/main/scala/com/gu/playdeveloperapi/Conversion.scala [14:20]
def searchForTrack(allTracks: List[Track], trackName: String): Option[Version] = {
allTracks
.find(_.track == trackName)
.map(track => track.releases)
.flatMap(_.find(_.status == "completed"))
.map(build => Version(build.name))
}