scrape/target.go
func (t *Target) SetDiscoveredLabels(l labels.Labels) {
	t.mtx.Lock()
	defer t.mtx.Unlock()
	t.discoveredLabels = l
}
func (t *Target) SetDiscoveredLabels(l labels.Labels) {
	t.mtx.Lock()
	defer t.mtx.Unlock()
	t.discoveredLabels = l
}
// SetDiscoveredLabels sets new DiscoveredLabels