pub trait ViewExt: 'static {
Show 14 methods
    fn title(&self) -> Option<GString>;
    fn set_title(&self, value: &str);
    fn stack(&self) -> Option<Stack>;
    fn set_stack(&self, value: &Stack);
    fn subtitle(&self) -> Option<GString>;
    fn set_subtitle(&self, value: &str);
    fn has_margins(&self) -> bool;
    fn set_has_margins(&self, value: bool);
    fn add_child(
        &self,
        builder: &Builder,
        child: &impl IsA<Object>,
        type_: Option<&str>
    );
    fn add(&self, widget: &impl IsA<Widget>);
    fn connect_title_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_stack_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_subtitle_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_has_margins_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
 }
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