@Override
    public List<Byte> serializeToByteList() throws IOException {
        this.count.setDecodedValue(this.content.size());

        List<Byte> result = new ArrayList<>(this.count.serializeToByteList());
        for (ExGuid extendGuid : this.content) {
            result.addAll(extendGuid.serializeToByteList());
        }

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

@return Return the byte list which store the byte information of ExGUIDArray.
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/ExGUIDArray.java