Navigator becoming God object

In one of our projects, the [`Navigator`](https://github.com/android10/Android-CleanArchitecture/blob/master/presentation/src/main/java/com/fernandocejas/android10/sample/presentation/navigation/Navigator.java) became a [God object](https://sourcemaking.com/antipatterns/the-blob), referencing more than 20 activities.

Wondering if you may have any thoughts about how to create a solution that does not result in a navigator with a huge method collection :-P.