Sample of exhaustive pattern matching

sample.rs

   pub fn wait_for_leader(&self) -> bool {
        self.wait_for_it(Duration::seconds(5), || {
            let election = self.election();
            match election.find_path(&["mine", "status"]) {
                Some(status) => match status.as_string() {
                    Some("Finished") => true,
                    Some(_) => false,
                    None => false,
                },
                None => false,
            }
        })
    }