Create from Usage: Add test for KT-14500

idea/testData/quickfix/createFromUsage/createFunction/invoke/lambdaArgument.kt.after

@@ -0,0 +1,13 @@
+// "Create extension function 'Test.invoke'" "true"
+class Test
+
+fun test() {
+    var t = Test()
+    t{
+
+    }
+}
+
+private operator fun Test.invoke(function: () -> Unit) {
+    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+}