Override `options` reference

Hello. 
If you call 'in one moment' 'in one place' multiple times `box()` so `model: { options }` referencing into one object. Result of this calling 'success' and 'warning' and 'danger' in same time one by one => 3 boxes with 'danger' style. 
I've found this solution, maybe you'll have another?

```
 resolve: { model: function () {  ... 
         options: angular.copy(options)  
} }
```

Thanks
