You can annotate a com.ramcosta.composedestinations.navargs.DestinationsNavTypeSerializer to signal the code generating task to consider the annotated class as a parser/serializer for a given type that will be used as navigation argument.

It allows you to make any type be considered a navigation argument type.

Also, it controls how the complex type will be represented in the route which can be good if you intend to navigate to the screen using the argument type through a deep link.