transit.rs

    fn sync(&mut self) -> EventResult<()> {
        let mut agencies: Vec<&str> = Vec::new();
        let mut routes: HashMap<&str, Vec<&str>> = HashMap::new();
        let mut stops: HashMap<&str, Vec<&str>> = HashMap::new();
        {
            for transit in self.transit.iter() {
                match transit.as_tuple() {
                    (agency, "", "") => agencies.push(agency),
                    (agency, route, "") => {
                        let mut agency_routes = routes.entry(agency).or_insert(Vec::new());
                        agency_routes.push(route);
                    },
                    (agency, "", stop) => {
                        let mut agency_stops = stops.entry(agency).or_insert(Vec::new());
                        agency_stops.push(stop);
                    }
                    _ => unreachable!(),
                }
            }
        }
        self.transit.clear();
        Ok(())
    }