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: mod.rs
    path of file: ./repos/rustrogueliketutorial/chapter-63-effects/src/map_builders/waveform_collapse
    
    the code of the file until where you have to start completion: use super::{MetaMapBuilder, BuilderMap, Map, TileType};
use rltk::RandomNumberGenerator;
mod common;
use common::*;
mod constraints;
use constraints::*;
mod solver;
use solver::*;

/// Provides a map builder us
    
    fn render_tile_gallery(&mut self, constraints: &[MapChunk], chunk_size: i32, build_data : &mut BuilderMap) {
        build_data.map = Map::new(0, build_data.width, build_data.height, &build_data.map.name);
        let mut counter = 0;
        let mut x = 1;
        let mut y = 1;
        while counter < constraints.len() {
            render_pattern_to_map(&mut build_data.map, &constraints[counter], chunk_size, x, y);

            x += chunk_size + 1;
            if x + chunk_size > build_data.map.width {
                // Move to the next row
                x = 1;
                y += chunk_size + 1;

                if y + chunk_size > build_data.map.height {
                    // Move to the next page
                    build_data.take_snapshot();
                    build_data.map = Map::new(0, build_data.width, build_data.height, &build_data.map.name);

                    x = 1;
                    y = 1;
                }
            }

            counter += 1;
        }
        build_data.take_snapshot();
    }