GObject
        NtdDevice
            NtdNull
            NtdSerial
        NtdIsp
            NtdLpc
            NtdStm
        NtdMonitor
        NtdProtocol
            NtdNardiNE
            NtdSimulator
        NtdSource
    GBoxed
        NtdAddress
    GEnum
        NtdBaud
        NtdDataBits
        NtdDigitalState
        NtdDumpMode
        NtdHardwareFlow
        NtdLpcModel
        NtdNardiNECommand
        NtdParity
        NtdProtocolError
        NtdSoftwareFlow
        NtdSourceType
        NtdStmAnswer
        NtdStmCommand
        NtdStopBits
        NtdSystemError