code: func (proxier *Proxier) appendServiceCommentLocked(args []string, svcName string) {
  	// Not printing these comments, can reduce size of iptables (in case of large
  	// number of endpoints) even by 40%+. So if total number of endpoint chains
  	// is large enough, we simply drop those comments.
  	if proxier.endpointChainsNumber > endpointChainsNumberThreshold {
  		return
  	}
  	args = append(args, "-m", "comment", "--comment", svcName)
  }
docs: // Assumes proxier.mu is held.