When you have access to a UIInjector, this property will contain the native $injector Angular 1 service.
example
:
```js
$transition.onStart({}, function(transition) {
var uiInjector = transition.injector();
var $injector = uiInjector.native;
var val = $injector.invoke(someFunction);
});
This enhances the common.UIInjector interface by adding the
$injectorservice as the native injector.