Hi, when using a RenderController wich way should we use the Index method ?

public IActionResult Index(ContentModel contentModel)
// will raise exception : AmbiguousMatchException: The request matched multiple endpoints.
// testable

or

public override IActionResult Index() { ... CurrentPage ... }
// works
// not testable

https://our.umbraco.com/documentation/implementation/Unit-Testing/#testing-a-rendercontroller shows method #1

https://our.umbraco.com/documentation/reference/routing/custom-controllers#creating-a-custom-controller shows method #2

thank you