components with animation prop should include or link to more information on AnimationBuilder

**URL**

https://ionicframework.com/docs/api/nav

**What is missing or inaccurate about the content on this page?**

The `animation` property of ion-nav says :

> By default ion-nav animates transition between pages based in the mode (ios or material design). However, this property allows to create custom transition using AnimateBuilder functions.

It's unclear what's "AnimateBuilder". I couldn't find any reference on that except in Dart ... maybe it's misspelled and it was `AnimationBuilder` of Angular ? Or maybe `Animation` and `AnimationController` from `@ionic/angular` ? I'm looking to override the animation to make the ion-nav slide in.

Thanks