Function importer::soundcast::trips::endpoints

fn endpoints(
    from: &Endpoint, 
    to: &Endpoint, 
    map: &Map, 
    osm_id_to_bldg: &HashMap<OsmID, BuildingID>, 
    (in_borders, out_borders): (&Vec<(IntersectionID, LonLat)>, &Vec<(IntersectionID, LonLat)>), 
    constraints: PathConstraints, 
    maybe_huge_map: Option<&(&Map, HashMap<OsmID, BuildingID>)>
) -> Option<(TripEndpoint, TripEndpoint)>