权限管理里面遇到的问题 帮忙看看

文档连接
用户授权《Laravel 8 中文文档》

像下面这个 $user->isAdmin 这个怎么来的呀？

use App\Models\User;
use Illuminate\Auth\Access\Response;
use Illuminate\Support\Facades\Gate;

Gate::define('edit-settings', function (User $user) {
    return $user->isAdmin
                ? Response::allow()
                : Response::deny('You must be an administrator.');
});

像下面这个 $user->isAdministrator() 这个怎么来的呀？

use Illuminate\Support\Facades\Gate;

Gate::before(function ($user, $ability) {
    if ($user->isAdministrator()) {
        return true;
    }
});