// Append a UUID, stored in _ls & _ds public void addUUID(long lo, long hi) { if (_ls == null || _ds == null || sparseLen() >= _ls.length) append2slowUUID(); _ls[sparseLen()] = lo; _ds[sparseLen()] = Double.longBitsToDouble(hi); set_sparseLen(sparseLen() + 1); set_len(_len + 1); assert sparseLen() <= _len; }