fun valuesNotNull(map: MutableMap<Int, String>) {
    map.putIfAbsent(1, "")
        // SUCCESS
        // ORIGINAL:    fun putIfAbsent(K, V): V? defined in kotlin.collections.MutableMap
        // SUBSTITUTED: fun putIfAbsent(Int, String): String? defined in kotlin.collections.MutableMap
}

fun valuesNullable(map: MutableMap<Int, String?>) {
    map.putIfAbsent(1, null)
        // SUCCESS
        // ORIGINAL:    fun putIfAbsent(K, V): V? defined in kotlin.collections.MutableMap
        // SUBSTITUTED: fun putIfAbsent(Int, String?): String? defined in kotlin.collections.MutableMap
}