import kotlin.reflect.*
import kotlin.reflect.jvm.*

class K {
    fun foo(s: String): Int = s.length()
}
fun bar(s: String): Int = s.length()
fun String.baz(): Int = this.length()

fun check(f: KFunction<Int>) {
    assert(f.javaConstructor == null, "Fail f constructor")
    assert(f.javaMethod != null, "Fail f method")
    val m = f.javaMethod!!

    assert(m.kotlinFunction != null, "Fail m function")
    val ff = m.kotlinFunction!!

    assert(f == ff, "Fail f != ff")
}

fun box(): String {
    check(K::foo)
    check(::bar)
    check(String::baz)

    return "OK"
}