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: child_window.rs
    path of file: ./repos/winit/examples
    
    the code of the file until where you have to start completion: #[cfg(all(
    feature = "rwh_06",
    any(x11_platform, macos_platform, windows_platform)
))]
#[allow(deprecated)]
fn main() -> Result<(), impl std::error::Error> {
    use std::collections::HashMap;

    use winit::dpi::{LogicalPosition, LogicalSize, Position};
    use winit::event::{ElementState, Event, KeyEvent, WindowEve
    
fn main() -> Result<(), impl std::error::Error> {
    use std::collections::HashMap;

    use winit::dpi::{LogicalPosition, LogicalSize, Position};
    use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
    use winit::event_loop::{ActiveEventLoop, EventLoop};
    use winit::raw_window_handle::HasRawWindowHandle;
    use winit::window::Window;

    #[path = "util/fill.rs"]
    mod fill;

    fn spawn_child_window(parent: &Window, event_loop: &ActiveEventLoop) -> Window {
        let parent = parent.raw_window_handle().unwrap();
        let mut window_attributes = Window::default_attributes()
            .with_title("child window")
            .with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
            .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
            .with_visible(true);
        // `with_parent_window` is unsafe. Parent window must be a valid window.
        window_attributes = unsafe { window_attributes.with_parent_window(Some(parent)) };

        event_loop.create_window(window_attributes).unwrap()
    }

    let mut windows = HashMap::new();

    let event_loop: EventLoop<()> = EventLoop::new().unwrap();
    let mut parent_window_id = None;

    event_loop.run(move |event: Event<()>, event_loop| {
        match event {
            Event::Resumed => {
                let attributes = Window::default_attributes()
                    .with_title("parent window")
                    .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
                    .with_inner_size(LogicalSize::new(640.0f32, 480.0f32));
                let window = event_loop.create_window(attributes).unwrap();

                parent_window_id = Some(window.id());

                println!("Parent window id: {parent_window_id:?})");
                windows.insert(window.id(), window);
            }
            Event::WindowEvent { window_id, event } => match event {
                WindowEvent::CloseRequested => {
                    windows.clear();
                    event_loop.exit();
                }
                WindowEvent::CursorEntered { device_id: _ } => {
                    // On x11, println when the cursor entered in a window even if the child window is created
                    // by some key inputs.
                    // the child windows are always placed at (0, 0) with size (200, 200) in the parent window,
                    // so we also can see this log when we move the cursor around (200, 200) in parent window.
                    println!("cursor entered in the window {window_id:?}");
                }
                WindowEvent::KeyboardInput {
                    event:
                        KeyEvent {
                            state: ElementState::Pressed,
                            ..
                        },
                    ..
                } => {
                    let parent_window = windows.get(&parent_window_id.unwrap()).unwrap();
                    let child_window = spawn_child_window(parent_window, event_loop);
                    let child_id = child_window.id();
                    println!("Child window created with id: {child_id:?}");
                    windows.insert(child_id, child_window);
                }
                WindowEvent::RedrawRequested => {
                    if let Some(window) = windows.get(&window_id) {
                        fill::fill_window(window);
                    }
                }
                _ => (),
            },
            _ => (),
        }
    })
}