# Functions
Register registers and returns a new metric.
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Snapshot returns a snapshot of all currently registered metrics.
UnProto converts a protos.MetricSnapshot into a metrics.MetricSnapshot.
# Structs
An Exporter produces MetricUpdates summarizing the change in metrics over time.
An Importer maintains a snapshot of all metric values, updating over time using the MetricUpdates generated by an Exporter.
Metric is a thread-safe readable and writeable metric.
MetricMap is a collection of metrics with the same name and label schema but with different label values.
A MetricSnapshot is a snapshot of a metric.