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: main.rs
    path of file: ./repos/amethyst/examples/sprites_ordered
    
    the code of the file until where you have to start completion: //! Demonstrates sprite loading and z ordering
use amethyst::{
    assets::{DefaultLoader, Handle, Loader, LoaderBundle, ProcessingQueue},
    core::{
        transform::{Transform, TransformBundle},
        Hidden,
    },
    ecs::{Entity, World},
    input::{get_key, is_close_requested, is_key_down, ElementState},
    prelude::*,
    renderer::{
        plugins::{RenderF
    
    fn redraw_sprites(&mut self, world: &mut World) {
        let &LoadedSpriteSheet {
            sprite_count,
            sprite_w,
            ..
        } = self
            .loaded_sprite_sheet
            .as_ref()
            .expect("Expected sprite sheet to be loaded.");

        // Delete any existing entities
        self.entities.drain(..).for_each(|entity| {
            world.remove(entity);
        });

        // Calculate offset to centre all sprites
        //
        // The X offset needs to be multiplied because we are drawing the sprites across the window;
        // we don't need to multiply the Y offset because we are only drawing the sprites in 1 row.
        let sprite_offset_translation_x =
            (sprite_count * sprite_w) as f32 * SPRITE_SPACING_RATIO / 2.;

        // This `Transform` moves the sprites to the middle of the window
        let mut common_transform = Transform::default();
        common_transform.set_translation_xyz(-sprite_offset_translation_x, 0.0, 0.0);

        self.draw_sprites(world, &common_transform);
    }