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    GObject
    ╰── GInitiallyUnowned
        ╰── GtkWidget
            ╰── GtkSeparator
                ├── GtkHSeparator
                ╰── GtkVSeparator
GtkSeparator is a horizontal or vertical separator widget, depending on the value of the “orientation” property, used to group the widgets within a window. It displays a line with a shadow to make it appear sunken into the interface.
GtkWidget *
gtk_separator_new (GtkOrientation orientation);
Creates a new GtkSeparator with the given orientation.
Since: 3.0