GtkObject
  GtkWidget
    GtkRange
      GtkScale
    GtkContainer
      GtkBin
        GtkButton
          GtkToggleButton
            GtkCheckButton
  BonoboObject
    ExecutiveSummaryComponent
    ExecutiveSummaryComponentFactory
    Handle to remote Bonobo::Unknown
      ExecutiveSummaryComponentFactoryClient
    ExecutiveSummaryHtmlView