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: lib.rs
    path of file: ./repos/seed/examples/todomvc/src
    
    the code of the file until where you have to start completion: #![allow(clippy::use_self)]

use enclose::enc;
use gloo_storage::{LocalStorage, Storage};
use indexmap::IndexMap;
use seed::{prelude::*, *};
use serde::{Deserialize, Serialize};
use std::mem;
use uuid::Uuid;
use web_sys::HtmlInputElement;

const ENTER_KEY: u32 = 13;
const ESC_KEY: u32 = 27;
const STORAGE_KEY: &str = "seed-todomvc";

type TodoId = Uuid;

// ------ ------
//     Init
// ------ ------

fn init(url: Url, orders: &mut impl Orders<Msg>) -> Model {
    orders
        .subscribe(Msg::UrlChanged)
        .notify(subs::UrlChanged(url));

    Model {
        data: LocalStorage::get(STORAGE_KEY).unwrap_or_default(),
        refs: Refs::default(),
    }
}

// ------ ------
//     Model
// ------ ------

// ------ Model ------

struct Model {
    data: Data,
    refs: Refs,
}

#[derive(Default, Serialize, Deserialize)]
struct Data {
    todos: IndexMap<TodoId, Todo>,
    filter: TodoFilter,
    new_todo_title: String,
    editing_todo: Option<EditingTodo>,
}

#[derive(Default)]
struct Refs {
    editing_todo_input: ElRef<HtmlInputElement>,
}

// ------ Todo ------

#[derive(Serialize, Deserialize)]
struct Todo {
    title: String,
    completed: bool,
}

// ------ EditingTodo ------

#[derive(Serialize, Deserialize)]
struct 
    
fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
    let data = &mut model.data;
    match msg {
        Msg::UrlChanged(subs::UrlChanged(mut url)) => {
            data.filter = match url.next_path_part() {
                Some(path_part) if path_part == TodoFilter::Active.to_url_path() => {
                    TodoFilter::Active
                }
                Some(path_part) if path_part == TodoFilter::Completed.to_url_path() => {
                    TodoFilter::Completed
                }
                _ => TodoFilter::All,
            };
        }
        Msg::NewTodoTitleChanged(title) => {
            data.new_todo_title = title;
        }
        Msg::ClearCompleted => {
            data.todos.retain(|_, todo| !todo.completed);
        }
        Msg::ToggleAll => {
            let all_todos_completed = data.todos.values().all(|todo| todo.completed);

            for (_, todo) in &mut data.todos {
                todo.completed = !all_todos_completed;
            }
        }

        Msg::CreateNewTodo => {
            data.todos.insert(
                TodoId::new_v4(),
                Todo {
                    title: mem::take(&mut data.new_todo_title),
                    completed: false,
                },
            );
        }
        Msg::ToggleTodo(todo_id) => {
            if let Some(todo) = data.todos.get_mut(&todo_id) {
                todo.completed = !todo.completed;
            }
        }
        Msg::RemoveTodo(todo_id) => {
            data.todos.shift_remove(&todo_id);
        }

        Msg::StartTodoEdit(todo_id) => {
            if let Some(todo) = data.todos.get(&todo_id) {
                data.editing_todo = Some({
                    EditingTodo {
                        id: todo_id,
                        title: todo.title.clone(),
                    }
                });
            }

            let input = model.refs.editing_todo_input.clone();
            orders.after_next_render(move |_| {
                input.get().expect("get `editing_todo_input`").select();
            });
        }
        Msg::EditingTodoTitleChanged(title) => {
            if let Some(ref mut editing_todo) = data.editing_todo {
                editing_todo.title = title;
            }
        }
        Msg::SaveEditingTodo => {
            if let Some(editing_todo) = data.editing_todo.take() {
                let title = editing_todo.title.trim();
                if title.is_empty() {
                    data.todos.shift_remove(&editing_todo.id);
                } else if let Some(todo) = data.todos.get_mut(&editing_todo.id) {
                    todo.title = title.to_owned();
                }
            }
        }
        Msg::CancelTodoEdit => {
            data.editing_todo = None;
        }
    }
    // Note: It should be optimized in a real-world application.
    LocalStorage::set(STORAGE_KEY, &data).expect("save data to LocalStorage");
}