Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GtkWidget
            ├── GtkContainer
               ╰── GtkBin
                   ├── GtkButton
                      ╰── GtkToggleButton
                          ╰── XfceArrowButton
                   ╰── GtkEventBox
                       ╰── XfcePanelPlugin
            ╰── XfcePanelImage