Closure on factory

I'm trying to use closures on factories like laravel docs:

/**
 * Define the model's default state.
 *
 * @return array
 */
public function definition()
{
    return [
        'user_id' => User::factory(),
        'user_type' => function (array $attributes) {
            return User::find($attributes['user_id'])->type;
        },
        'title' => $this->faker->title(),
        'content' => $this->faker->paragraph(),
    ];
}

But when I try to run a seeder that calls the factory I get "Object of class Closure could not be converted to string".

This feature isn't available at Lumen? I'm using Lumen 8.2.3