How to define panel route

How can I define panel route, I want to pass it like

/posts/{slug}

/posts/{slug}

with route name

return $panel
  ->routes() // what should we pass here

return $panel
  ->routes() // what should we pass here

Solution

Oh, I though my below code is wrong, but it's working..

->routes(function () {
    return Route::get('posts/{slug}', \App\Filament\App\Pages\PostDetail::class)->name('post');
})

->routes(function () {
    return Route::get('posts/{slug}', \App\Filament\App\Pages\PostDetail::class)->name('post');
})

I saw it on

route:list

route:list