// PARAM_TYPES: X
// PARAM_TYPES: Y
// PARAM_DESCRIPTOR: public final fun X.test(): kotlin.Unit defined in Y
// PARAM_DESCRIPTOR: public final class Y defined in root package in file addPrefixToBackticks.kt
class X(val x: Int)

// SIBLING:
class Y(val y: Int) {
    fun X.test() {
        __dummyTestFun__(this, this@Y)
    }
}

private fun __dummyTestFun__(x1: X, y1: Y) {
    x1.`x` plus y1.y
}