Trait CellRendererToggleImpl
gtk::subclass::cell_renderer_toggle
pub trait CellRendererToggleImpl: CellRendererToggleImplExt + CellRendererImpl + 'static { fn toggled(&self, renderer: &CellRendererToggle, path: &str) { ... } }
fn toggled(&self, renderer: &CellRendererToggle, path: &str)