public static function setTranslator($name, callable $loader, $locale = null)
    {
        $locale = $locale ?: static::getLocale();

        $translators = static::translators();
        $loader = $translators->setLoaderFallback($name, $loader);
        $packages = $translators->getPackages();
        $packages->set($name, $locale, $loader);
    }
public static function setTranslator($name, callable $loader, $locale = null)
    {
        $locale = $locale ?: static::getLocale();

        $translators = static::translators();
        $loader = $translators->setLoaderFallback($name, $loader);
        $packages = $translators->getPackages();
        $packages->set($name, $locale, $loader);
    }
public static function setTranslator ( $ name , callable $ loader , $ locale = null ) { $ locale = $ locale ? : static :: getLocale ( ) ; $ translators = static :: translators ( ) ; $ loader = $ translators -> setLoaderFallback ( $ name , $ loader ) ; $ packages = $ translators -> getPackages ( ) ; $ packages -> set ( $ name , $ locale , $ loader ) ; }
Sets a translator.

Configures future translators, this is achieved by passing a callable
as the last argument of this function.

### Example:

```
I18n::setTranslator('default', function () {
$package = new \Aura\Intl\Package();
$package->setMessages([
'Cake' => 'Gâteau'
]);
return $package;
}, 'fr_FR');

$translator = I18n::getTranslator('default', 'fr_FR');
echo $translator->translate('Cake');
```

You can also use the `Cake\I18n\MessagesFileLoader` class to load a specific
file from a folder. For example for loading a `my_translations.po` file from
the `src/Locale/custom` folder, you would do:

```
I18n::setTranslator(
'default',
new MessagesFileLoader('my_translations', 'custom', 'po'),
'fr_FR'
);
```

@param string $name The domain of the translation messages.
@param callable $loader A callback function or callable class responsible for
constructing a translations package instance.
@param string|null $locale The locale for the translator.
@return void
Sets a translator .