# Functions
CurrentFDs reports how many file descriptors are currently open.
LabelString returns a Prometheus-formatted label string for the given key.
NewHistogram returns a new histogram that reports to the given expvar map under the given name.
NewMultiLabelMap creates and publishes (via expvar.Publish) a new MultiLabelMap[T] variable with the given name and returns it.
# Structs
Histogram is a histogram of values.
KeyValue represents a single entry in a [MultiLabelMap].
LabelMap is a string-to-Var map variable that satisfies the expvar.Var interface.
MultiLabelMap is a struct-value-to-Var map variable that satisfies the [expvar.Var] interface but also allows for multiple Prometheus labels to be associated with each value.
Set is a string-to-Var map variable that satisfies the expvar.Var interface.