code: func (m *Manager) TargetsDropped() map[string][]*Target {
  	m.mtxScrape.Lock()
  	defer m.mtxScrape.Unlock()
  
  	targets := make(map[string][]*Target, len(m.scrapePools))
  	for tset, sp := range m.scrapePools {
  		targets[tset] = sp.DroppedTargets()
  	}
  	return targets
  }
docs: // TargetsDropped returns the dropped targets during relabelling.