Create from usage: Added tests.

idea/testData/quickfix/createFromUsage/set/afterCreateSetFromUsage2.kt

@@ -0,0 +1,11 @@
+// "Create method 'set' from usage" "true"
+import java.util.ArrayList
+
+class Foo<T> {
+    fun <T> x (y: Any, w: java.util.ArrayList<T>) {
+        y["", w] = w
+    }
+}
+fun <T> Any.set(s: String, w: ArrayList<T>, value: ArrayList<T>) {
+    throw Exception("not implemented") //To change body of created methods use File | Settings | File Templates.
+}