Object Hierarchy

    GObject
        IBusObject
            IBusService
                IBusFactory
                IBusEngine
            IBusSerializable
                IBusFactoryInfo
                IBusAttribute
                IBusAttrList
                IBusObservedPath
                IBusLookupTable
                IBusComponent
                IBusProperty
                IBusPropList
                IBusText
                IBusHotkeyProfile
                IBusEngineDesc
            IBusProxy
                IBusInputContext
                IBusConfig
            IBusServer
            IBusConnection
            IBusBus