NewCounter returns a multi-counter, wrapping the passed counters.

NewGauge returns a multi-gauge, wrapping the passed gauges.

NewHistogram returns a multi-histogram, wrapping the passed histograms.

Counter collects multiple individual counters and treats them as a unit.

Gauge collects multiple individual gauges and treats them as a unit.

Histogram collects multiple individual histograms and treats them as a unit.