```interface Fetcher<Key : Any, Network : Any>``` ...

# store

[Jeffrey Dawes]

interface Fetcher<Key : Any, Network : Any>

Because Network is non-null how do we represent a value that does not exist or is not found? Do you wrap the response in a result type? Do you return a Fetcher.Error of some kind?

[blakelee]

I do something like this

data class NetworkType(
  val data: TypeData
)

sealed class TypeData {
  data class Single(val type: Type) : TypeData()
  data class Collection(val types: List<Type>) : TypeData()
}

You could just make the data nullable in this case if there's nothing to add