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: rooms_corridors_lines.rs
    path of file: ./repos/rustrogueliketutorial/chapter-41-camera/src/map_builders
    
    the code of the file until where you have to start completion: use super::{MetaMapBuilder, BuilderMap, Rect, TileType };
use rltk::RandomNumberGenerator;
use std::collections::HashSet;

pub struct StraightLineCorridors {}

impl MetaMapBuilder for StraightLineCorridors {
    #[allow(dead_code)]
    fn build_map(&mut self, rng: &mut rltk::RandomNumberGenerator, build_data : &mut BuilderMap) {
        self.corridors(rng, build_data);
    }
}

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

    fn corridors(&mut self, _rng : &mut RandomNumberGenerator, build_data : &mut BuilderMap) {
        let rooms : Vec<Rect>;
        if let Some(rooms_builder) = &build_data.rooms {
            rooms = rooms_builder.clone();
        } else {
            panic!("Straight Line Corridors require a builder with room structures");
        }

        let mut connected : HashSet<usize> = HashSet::new();
        let mut corridors : Vec<Vec<usize>> = Vec::new();
        for (i,room) in rooms.iter().enumerate() {
            let mut room_distance : Vec<(usize,
    
    fn corridors(&mut self, _rng : &mut RandomNumberGenerator, build_data : &mut BuilderMap) {
        let rooms : Vec<Rect>;
        if let Some(rooms_builder) = &build_data.rooms {
            rooms = rooms_builder.clone();
        } else {
            panic!("Straight Line Corridors require a builder with room structures");
        }

        let mut connected : HashSet<usize> = HashSet::new();
        let mut corridors : Vec<Vec<usize>> = Vec::new();
        for (i,room) in rooms.iter().enumerate() {
            let mut room_distance : Vec<(usize, f32)> = Vec::new();
            let room_center = room.center();
            let room_center_pt = rltk::Point::new(room_center.0, room_center.1);
            for (j,other_room) in rooms.iter().enumerate() {
                if i != j && !connected.contains(&j) {
                    let other_center = other_room.center();
                    let other_center_pt = rltk::Point::new(other_center.0, other_center.1);
                    let distance = rltk::DistanceAlg::Pythagoras.distance2d(
                        room_center_pt,
                        other_center_pt
                    );
                    room_distance.push((j, distance));
                }
            }

            if !room_distance.is_empty() {
                room_distance.sort_by(|a,b| a.1.partial_cmp(&b.1).unwrap() );
                let dest_center = rooms[room_distance[0].0].center();
                let line = rltk::line2d(
                    rltk::LineAlg::Bresenham,
                    room_center_pt,
                    rltk::Point::new(dest_center.0, dest_center.1)
                );
                let mut corridor = Vec::new();
                for cell in line.iter() {
                    let idx = build_data.map.xy_idx(cell.x, cell.y);
                    if build_data.map.tiles[idx] != TileType::Floor {
                        build_data.map.tiles[idx] = TileType::Floor;
                        corridor.push(idx);
                    }
                }
                corridors.push(corridor);
                connected.insert(i);
                build_data.take_snapshot();
            }
        }
        build_data.corridors = Some(corridors);
    }