NumPtsPerMetric: OnePt, ManyPts
MetricType: DoubleGauge, MonotonicDoubleSum, NonMonotonicDoubleSum, IntGauge, MonotonicIntSum, NonMonotonicIntSum, IntHistogram, DoubleHistogram
NumLabels: NoLabels, OneLabel, ManyLabels
NumResourceAttrs: NoAttrs, OneAttr, TwoAttrs
