NewAggregator creates a new instance of aggregator.

NewGenerator creates a new instance of Generator(gauge, bucketGauge, counter, rate, count, set, histogram).

NewMetric creates a new instance of Metric.

UpdateMap XXX.

DefaultExpirySeconds is default to 5 minutes.

DefaultRecentPointThreshold is default to 1 hour.

DefaultHistogramAggregates XXX.

DefaultHistogramPercentiles XXX.

Field XXX.

Metric XXX.

Aggregator XXX.

Generator generates metrics.

Context XXX.

Formatter XXX.