code: func concatAndGetBytes(arr []string, delim string) []byte {
  	cstr := ""
  	for _, s := range arr {
  		cstr += s
  		cstr += delim
  	}
  	return []byte(cstr)
  }
docs: // REVU - this is buggy in conjunction with callsite usage (when arr is nil)
  // deprecated - TODO convert asynchclient.go to use appendAndConvert