Undefined Model Event Lifecycle - retrieved 

I try to access the retrieved event hook on a model but it throws the following exception;

```
BadMethodCallException
Call to undefined method Jenssegers\Mongodb\Query\Builder::retrieved()
in Builder.php (line 2445)
```

**Model Event Hook**
`Email::retrieved(function($email){
   \Log::info($email->subject); 
});`

