pub trait IconViewImplExt: ObjectSubclass {
    fn parent_item_activated(&self, icon_view: &Self::Type, path: &TreePath);
    fn parent_selection_changed(&self, icon_view: &Self::Type);
    fn parent_select_all(&self, icon_view: &Self::Type);
    fn parent_unselect_all(&self, icon_view: &Self::Type);
    fn parent_select_cursor_item(&self, icon_view: &Self::Type);
    fn parent_toggle_cursor_item(&self, icon_view: &Self::Type);
    fn parent_move_cursor(
        &self, 
        icon_view: &Self::Type, 
        step: MovementStep, 
        count: i32
    ) -> bool;
    fn parent_activate_cursor_item(&self, icon_view: &Self::Type) -> bool;
}