get_ancestor
Description:
Gets the first ancestor of the widget with type widget_type.
For example, `gtk_widget_get_ancestor (widget, GTK_TYPE_BOX)` gets the first `GtkBox` that’s an ancestor of this . No reference will be added to the returned widget; it should not be unreferenced.
Note that unlike [method@Gtk.Widget.is_ancestor], this function considers this to be an ancestor of itself.
Parameters:
| this | 
           a widget  | 
      
| widget_type | 
           ancestor type  | 
      
Returns:
| 
           the ancestor widget  |