in src/main/scala/com/twitter/iago/feeder/ParrotFeeder.scala [241:249]
private[this] def getResults(remotes: Set[RemoteParrot]): Results = {
var successes = 0
var failures = 0
remotes foreach (successes += _.results.success)
remotes foreach (failures += _.results.failure)
Results(successes, failures)
}