kubernetes/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go

type expvarCollector …

// NewExpvarCollector is the obsolete version of collectors.NewExpvarCollector.
// See there for documentation.
//
// Deprecated: Use collectors.NewExpvarCollector instead.
func NewExpvarCollector(exports map[string]*Desc) Collector { … }

// Describe implements Collector.
func (e *expvarCollector) Describe(ch chan<- *Desc) { … }

// Collect implements Collector.
func (e *expvarCollector) Collect(ch chan<- Metric) { … }