mwid = new MWID(buff);
buff.position(base_offs + header.getDooDsDefOffs());
mddf = new MDDF(buff);
buff.position(base_offs + header.getObjDefOffs());
modf = new MODF(buff);
if (version_flag >= ADT_VERSION_EXPANSION_TBC)
if (header.getoffsMH2O() != 0) {
buff.position(base_offs + header.getoffsMH2O());
mh2o = new unkChunk(buff, "O2HM");