HandleStringOrNullResult

Handles a Route.Result.Data matching a String or null Requires that the Route.Result.Data.bundle is described by a SingleValueNavigationSpec matching NavigationBundleSpecType.StringType either directly or wrapped by NavigationBundleSpecType.OptionalType

Parameters

retain

If true the result will be retained in the NavBackStackEntry. It will be deleted otherwise.

onResult

Method for handling the received String or null