public static LinkedBuffer writeUTF8FixedDelimited(final CharSequence str,
            final WriteSession session, LinkedBuffer lb)
    {
        return writeUTF8FixedDelimited(str, false, session, lb);
    }
The length of the utf8 bytes is written first (big endian) before the string - which is fixed 2-bytes. Same
behavior as {@link java.io.DataOutputStream#writeUTF(String)}.
protostuff-api/src/main/java/io/protostuff/StringSerializer.java