//manually write the first half of the string "barbaz"
r_out.write_ulong( 7 ); //string length
r_out.write_octet( (byte) 'b' );
r_out.write_octet( (byte) 'a' );
r_out.write_octet( (byte) 'r' );
r_out.insertMsgSize();
byte[] b = r_out.getBufferCopy();
b[6] |= 0x02; //set "more fragments follow"