<set name="UpdateFlags" encodingType="uint8">
            <choice name="Begin">0</choice>
            <choice name="End">1</choice>
        </set>
        <composite name="messageHeader" description="Template ID and length of message root">
            <type name="blockLength" primitiveType="uint16"/>
            <type name="templateId" primitiveType="uint16"/>
            <type name="schemaId" primitiveType="uint16"/>
            <type name="version" primitiveType="uint16"/>
            <ref name="flags" type="UpdateFlags"/>
        </composite>

private:                                                                                        
    Flags m_flags;
public:
    Flags &flags()
    {   
        m_flags.wrap(m_buffer, m_offset + 8, m_actingVersion, m_bufferLength);
        return m_flags;
    }