loadConfiguration does

```php
$config = \Arr::merge($config, \Config::load($dependency.'::'.$file_name, true));
```

and extendable load
```php
\Config::load($dependency.'::'.$file_name, true);
$config = \Arr::merge($config, \Config::get($dependency.'::'.$file_name, array()));
```

so theoretically it does the same thing (except maybe default value, but then I shoud put it on loadConfiguratino)