You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: simple_map.rs
    path of file: ./repos/rustrogueliketutorial/chapter-75-darkplaza/src/map_builders
    
    the code of the file until where you have to start completion: use super::{InitialMapBuilder, BuilderMap, Rect };

pub struct SimpleMapBuilder {}

impl InitialMapBuilder for SimpleMapBuilder {
    #[allow(dead_code)]
    fn build_map(&mut self, build_data : &mut BuilderMap) {
        self.build_rooms(build_data);
    }
}

impl SimpleMapBuilder {
    #[allow(dead_code)]
    pub fn new() -> Box<SimpleMapBuilder> {
        Box::new(SimpleMapBuilder{})
    }

    fn build_rooms(&mut self, build_data : &mut BuilderMap) {
        const MAX_ROOMS : i32 = 30;
        const MIN_SIZE : i32 = 6;
        const MAX_SIZE : i32 = 10;
        let mut rooms : Vec<Rect> = Vec::new();

        for _i in 0..MAX_ROOMS {
            let w = crate::rng::range(MIN_SIZE, MAX_SIZE);
            let h = crate::r
    
    fn build_rooms(&mut self, build_data : &mut BuilderMap) {
        const MAX_ROOMS : i32 = 30;
        const MIN_SIZE : i32 = 6;
        const MAX_SIZE : i32 = 10;
        let mut rooms : Vec<Rect> = Vec::new();

        for _i in 0..MAX_ROOMS {
            let w = crate::rng::range(MIN_SIZE, MAX_SIZE);
            let h = crate::rng::range(MIN_SIZE, MAX_SIZE);
            let x = crate::rng::roll_dice(1, build_data.map.width - w - 1) - 1;
            let y = crate::rng::roll_dice(1, build_data.map.height - h - 1) - 1;
            let new_room = Rect::new(x, y, w, h);
            let mut ok = true;
            for other_room in rooms.iter() {
                if new_room.intersect(other_room) { ok = false }
            }
            if ok {
                rooms.push(new_room);
            }
        }
        build_data.rooms = Some(rooms);
    }