code: func serviceLBChainName(servicePortName string, protocol string) utiliptables.Chain {
  	return utiliptables.Chain("KUBE-XLB-" + portProtoHash(servicePortName, protocol))
  }
docs: // serviceLBPortChainName takes the ServicePortName for a service and
  // returns the associated iptables chain.  This is computed by hashing (sha256)
  // then encoding to base32 and truncating with the prefix "KUBE-XLB-".  We do
  // this because IPTables Chain Names must be <= 28 chars long, and the longer
  // they are the harder they are to read.