Exploring how kotlin extension functions are resolved

extension-func-resolution.kt

interface Base<T: Base<T>>
interface Derived<T: Derived<T>> : Base<T>
class Impl: Derived<Impl>
data class Container<T>(val t: T)

@JvmName("f1")
fun <T: Base<T>> Container<T>.someFunc(c: Container<T>) =
    println("generic: $c")
@JvmName("f2")
fun Container<out Derived<*>>.someFunc(c: Container<out Derived<*>>) =
	println("star projection: $c")

@JvmName("g1")
fun <T: Derived<T>> Container<T>.someOtherFunc(c: Container<T>) =
    println("generic: $c")
@JvmName("g2")
fun Container<out Derived<*>>.someOtherFunc(c: Container<out Derived<*>>) =
	println("star projection: $c")

fun main() {
    val c = Container(Impl())
    c.someFunc(c)
    c.someOtherFunc(c)
}