in src/main/scala/com/spotify/bdrc/pipeline/Statistics.scala [57:66]
def scalding(input: TypedPipe[Rating]): TypedPipe[Stats] =
input.aggregate(aggregator)
// ## Scio
def scio(input: SCollection[Rating]): SCollection[Stats] = {
input
.map(_.score)
.stats
.map(s => Stats(s.max, s.min, s.sum, s.count, s.mean, s.stdev))
}