code: func utf8ToString(iso8859_1_buf []byte) string {
  	buf := make([]rune, len(iso8859_1_buf))
  	for i, b := range iso8859_1_buf {
  		buf[i] = rune(b)
  	}
  	return string(buf)
  }
docs: // Simpler version of Lucene's own method