pub trait MarkExt: 'static {
// Required methods
fn get_category(&self) -> Option<GString>;
fn next(&self, category: Option<&str>) -> Option<Mark>;
fn prev(&self, category: &str) -> Option<Mark>;
}
pub trait MarkExt: 'static {
// Required methods
fn get_category(&self) -> Option<GString>;
fn next(&self, category: Option<&str>) -> Option<Mark>;
fn prev(&self, category: &str) -> Option<Mark>;
}