code: func appendAndConvert(a0 string, arr ...string) [][]byte {
  	sarr := make([][]byte, 1+len(arr))
  	sarr[0] = []byte(a0)
  	for i, v := range arr {
  		sarr[i+1] = []byte(v)
  	}
  	return sarr
  }
docs: // REVU - use this instead of concatAndGetBytes TODO - for asynch