public static HistogramSumStage newInstance(GraphManager gm, Pipe<HistogramSchema> output, Pipe<HistogramSchema> ... inputs) { return new HistogramSumStage(gm, output, inputs); }
while (Pipe.hasRoomForWrite(output) && allHaveData(inputs)) {
HistogramSumStage.newInstance(gm, output, inputs);