in src/main/java/com/google/cloud/dfmetrics/pipelinemanager/MonitoringClient.java [140:147]
private Aggregation getAggregation(
Duration alignmentPeriod, Aggregation.Aligner aligner, Aggregation.Reducer reducer) {
return Aggregation.newBuilder()
.setAlignmentPeriod(alignmentPeriod)
.setPerSeriesAligner(aligner)
.setCrossSeriesReducer(reducer)
.build();
}