Extract Function: Support multiple output values

idea/testData/refactoring/extractFunction/controlFlow/outputValues/genericPair.kt

@@ -0,0 +1,19 @@
+// WITH_RUNTIME
+// PARAM_TYPES: A?, kotlin.Any?
+// PARAM_TYPES: B, A
+// PARAM_TYPES: kotlin.Int
+// PARAM_DESCRIPTOR: var a: A? defined in foo
+// PARAM_DESCRIPTOR: value-parameter val b: B defined in foo
+// PARAM_DESCRIPTOR: var c: kotlin.Int defined in foo
+// SIBLING:
+fun foo<A: Any, B: A>(b: B): Int {
+    var a: A? = null
+    var c: Int = 1
+
+    <selection>a = b
+    c += 2
+    println(a)
+    println(c)</selection>
+
+    return a.hashCode() ?: 0 + c
+}