pub trait SideBarExt: 'static {
Show 15 methods
    fn title(&self) -> Option<GString>;
    fn set_title(&self, value: &str);
    fn subtitle(&self) -> Option<GString>;
    fn set_subtitle(&self, value: &str);
    fn shows_buttons(&self) -> bool;
    fn set_show_buttons(&self, value: bool);
    fn shows_back(&self) -> bool;
    fn set_show_back(&self, value: bool);
    fn stack(&self) -> Option<Stack>;
    fn set_stack(&self, value: &Stack);
    fn connect_title_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_subtitle_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_show_buttons_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_show_back_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_stack_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
 }
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