Is it possible for me to do something like that? `...

# getting-started

[gabrielfv]

Is it possible for me to do something like that?

fun <T : Any> Producer<in T>.consume(consume: (T) -> Unit) {
    attachConsumer(Consumer<T?> { it?.let(consume) })
}

The producer is a Java class that is null-unsafe, and I want to be able to consume it on a null-safe manner, filtering out any possible nulls, and having my consuming function only see non-null values. If I don't tell that my producer is contravariant in the expected type, I have to manually call it like consume<MyType>, otherwise my lambda will receive a MyType!. If I try the above, however, I'll get an error: "Required: Consumer<Any?>, Found: Consumer<T?>". Shouldn't Consumer<T?> be acceptable as a Consumer<Any?>? Or am I completely lost in generic typing?