@Override
    public List<Byte> serializeToByteList() throws IOException {
        List<Byte> byteList = new ArrayList<Byte>((new Compact64bitInt(this.count)).serializeToByteList());
        if (this.content != null) {
            for (CellID extendGuid : this.content) {
                byteList.addAll(extendGuid.serializeToByteList());
            }
        }

        return byteList;
    }
This method is used to convert the element of CellIDArray basic object into a byte List.

@return Return the byte list which store the byte information of CellIDArray.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/onenote/fsshttpb/streamobj/basic/CellIDArray.java