# Functions
NewCounter returns a new Counter.
NewCounterMap returns a new CounterMap.
NewGauge returns a new Gauge.
NewGaugeMap returns a new GaugeMap.
NewHistogram returns a new Histogram.
NewHistogramMap returns a new HistogramMap.
# Structs
A Counter is a float-valued, monotonically increasing metric.
A CounterMap is a collection of Counters with the same name and label schema but with different label values.
A Gauge is a float-valued metric that can hold an arbitrary numerical value, which can increase or decrease over time.
A GaugeMap is a collection of Gauges with the same name and label schema but with different label values.
A Histogram is a metric that counts the number of values that fall in specified ranges (i.e.
A HistogramMap is a collection of Histograms with the same name and label schema but with different label values.