I want to break the binding. No need to obsereve these changes in the default behavior.
What I mean is that last night I tried:
```javascript
scope.closeText  = scope.closeText || datepickerPopupConfig.closeText;
```
in the tempate the `{{closeText}}` was evaluated again from the attribute, ie `null`, didn't get the default value.
That's why I assign in a different variable.

I hope this makes sense :-)