<Generic producer and consumer without exposing co...

# stackoverflow

[user]

Generic producer and consumer without exposing concrete types in Kotlin
I've been reading up on Kotlin generics for a while and came to a sense that it's a very powerful feature of the language.
This made me wonder and experiment, and I can't figure out a nice solution to the following problem. Say I have the following code:
interface WidgetProducerConsumer {
fun produce(): Widget
fun consume(widget: Widget)

companion object {
fun getStringWidgetProducerConsumer(): WidgetProducerConsumer {
return StringWidgetProducerConsumer()...