EncodeLogTailMetricsDelta return an encoded string representing the metrics differences since the previous call.

HasPublished reports whether a metric with the given name has already been published.

Metrics returns the sorted list of metrics.

NewCounter returns a new metric that can only increment.

NewGauge returns a new metric that can both increment and decrement.

NewUnpublished initializes a new Metric without calling Publish on it.

WritePrometheusExpositionFormat writes all client metrics to w in the Prometheus text-based exposition format.

Metric is an integer metric value that's tracked over time.

Type is a metric type: counter or gauge.