fn pick_mode(
from: TripEndpoint,
to: TripEndpoint,
map: &Map,
rng: &mut XorShiftRng,
config: &Config,
) -> TripMode
fn pick_mode(
from: TripEndpoint,
to: TripEndpoint,
map: &Map,
rng: &mut XorShiftRng,
config: &Config,
) -> TripMode