in app/com/gu/floodgate/reindex/ProgressTrackerController.scala [35:41]
private def remove(contentSource: ContentSource, runningJob: RunningJob): Unit = {
runningTrackers.get(contentSource.uniqueId).foreach {
case tracker =>
tracker ! Cancel(contentSource, runningJob)
runningTrackers = runningTrackers - contentSource.uniqueId
}
}