code: func IsAllowAll(ipnets utilnet.IPNetSet) bool {
  	for _, s := range ipnets.StringSlice() {
  		if s == "0.0.0.0/0" {
  			return true
  		}
  	}
  	return false
  }
docs: // IsAllowAll checks whether the utilnet.IPNet allows traffic from 0.0.0.0/0