Как создать кастомный помощник в CakePHP?

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namespace AppViewHelper;

use CakeViewHelperAppHelper;

class CustomHelper extends AppHelper
{
    // Код помощника
}

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namespace AppViewHelper;

use CakeViewHelperAppHelper;

class CustomHelper extends AppHelper
{
    public function sayHello($name)
    {
        return "Привет, $name!";
    }
}

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namespace AppView;

use CakeViewView;
use AppViewHelperCustomHelper;

class AppView extends View
{
    public function initialize()
    {
        parent::initialize();
        $this->loadHelper('Custom', ['className' => 'AppViewHelperCustomHelper']);
    }
}

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<?= $this->Custom->sayHello('Alice') ?>