protected internal override IEnumerable <DxfCodePair> GetSpecificPairs(DxfAcadVersion version, bool outputHandles, HashSet <IDxfItem> writtenItems)
        {
            var list = new List <DxfCodePair>();

            list.Add(new DxfCodePair(90, RawData.Length));

            // write lines in 128-byte chunks (expands to 256 hex bytes)
            var hex   = DxfCommonConverters.HexBytes(RawData);
            var lines = DxfCommonConverters.SplitIntoLines(hex, 256);

            list.AddRange(lines.Select(l => new DxfCodePair(310, l)));
            return(list);
        }