gauge.go
func (m *CirconusMetrics) SetGauge(metric string, val interface{}) {
	m.gm.Lock()
	defer m.gm.Unlock()
	m.gauges[metric] = val
}
func (m *CirconusMetrics) SetGauge(metric string, val interface{}) {
	m.gm.Lock()
	defer m.gm.Unlock()
	m.gauges[metric] = val
}
func ( m * CirconusMetrics ) SetGauge ( metric string , val interface { } ) { m . gm . Lock ( ) defer m . gm . Unlock ( ) m . gauges [ metric ] = val }
// SetGauge sets a gauge to a value
SetGauge sets a gauge to a value