fn generate_buildings_on_empty_residential_roads(
map: &Map,
rng: &mut XorShiftRng,
timer: &mut Timer<'_>,
) -> Vec<Polygon>
fn generate_buildings_on_empty_residential_roads(
map: &Map,
rng: &mut XorShiftRng,
timer: &mut Timer<'_>,
) -> Vec<Polygon>