code: func (b *bruteRanger) Insert(entry RangerEntry) error {
  	network := entry.Network()
  	key := network.String()
  	if _, found := b.ipV4Entries[key]; !found {
  		entries, err := b.getEntriesByVersion(entry.Network().IP)
  		if err != nil {
  			return err
  		}
  		entries[key] = entry
  	}
  	return nil
  }
docs: // Insert inserts a RangerEntry into ranger.