code: func (a *AddrBook) addToNewBucket(ka *knownAddress, bucketIdx int) bool {
  	// Sanity check
  	if ka.isOld() {
  		log.Warn(Fmt("Cannot add address already in old bucket to a new bucket: %v", ka))
  		return false
  	}
  
  	addrStr := ka.Addr.String()
  	bucket := a.getBucket(bucketTypeNew, bucketIdx)
  
  	// Already exists?
  	if _, ok := bucket[addrStr]; ok {
  		return true
  	}
  
  	// Enforce max addresses.
  	if len(bucket) > newBucketSize {
  		log.Notice("new bucket is full, expiring old ")
  		a.expireNew(bucketIdx)
  	}
  
  	// Add to bucket.
  	bucket[addrStr] = ka
  	if ka.addBucketRef(bucketIdx) == 1 {
  		a.nNew++
  	}
  
  	// Ensure in addrLookup
  	a.addrLookup[addrStr] = ka
  
  	return true
  }
docs: // Adds ka to new bucket. Returns false if it couldn't do it cuz buckets full.
  // NOTE: currently it always returns true.