in app/lib/RepoUpdater.scala [26:31]
def missingLabelsGiven(repoLevelDetails: RepoLevelDetails, existingLabelNames: Set[String]): Set[CreateLabel] = for {
prcs <- PullRequestCheckpointStatus.all ++ CheckpointTestStatus.all
checkpointName <- repoLevelDetails.config.checkpointsByName.keySet
label = prcs.labelFor(checkpointName)
if !existingLabelNames(label)
} yield CreateLabel(label, prcs.defaultColour)