how to specify name in laravel factory code example

Example 1: php artisan make factory

php artisan make:factory AddressFactory --model="App\\Address"

Example 2: laravel factory relations data

factory(App\User::class, 30)->create()->each(function($user) {

    $entity = factory(App\Entity::class)->make();

    $address = factory(App\Address::class)->create([
        'entity_id' => $entity
    ]);

    $user->entities()->save($entity);
});