HandleUnitResult
Handles a Route.Result.Data matching a Unit Requires that the Route.Result.Data.bundle is described by a SingleValueNavigationSpec matching NavigationBundleSpecType.UnitType
Parameters
retain
If true
the result will be retained in the NavBackStackEntry. It will be deleted otherwise.
onResult
Method for handling the result
Throws
if the Bundle is not associated with a SingleValueNavigationSpec matching NavigationBundleSpecType.UnitType.