kotlin/compiler/testData/diagnostics/testsWithStdLib/callableReference/function/memberFromExtension.kt

import kotlin.reflect.*

class A {
    fun foo() {}
    fun bar(<!UNUSED_PARAMETER!>x<!>: Int) {}
    fun baz() = "OK"
}
    
fun A.main() {
    val x = ::foo
    val y = ::bar
    val z = ::baz

    x : KMemberFunction0<A, Unit>
    y : KMemberFunction1<A, Int, Unit>
    z : KMemberFunction0<A, String>
}