Function game::edit::bulk::make_bulk_edits

fn make_bulk_edits(
    ctx: &mut EventCtx<'_>, 
    app: &mut App, 
    roads: &Vec<RoadID>, 
    speed_limit: Option<Speed>, 
    lt_transformations: Vec<(Option<LaneType>, Option<LaneType>)>
) -> Box<dyn State>