Add data modifier to a class quickfix #KT-18220 Fixed

idea/testData/quickfix/addDataModifier/sealed.kt

@@ -0,0 +1,15 @@
+// "Make 'Foo' data class" "false"
+// ACTION: Create extension function 'Foo.component1'
+// ACTION: Create extension function 'Foo.component2'
+// ACTION: Create member function 'Foo.component1'
+// ACTION: Create member function 'Foo.component2'
+// ACTION: Put arguments on separate lines
+// ERROR: Cannot access '<init>': it is private in 'Foo'
+// ERROR: Destructuring declaration initializer of type Foo must have a 'component1()' function
+// ERROR: Destructuring declaration initializer of type Foo must have a 'component2()' function
+// ERROR: Sealed types cannot be instantiated
+sealed class Foo(val bar: String, val baz: Int)
+
+fun test() {
+    var (bar, baz) = Foo("A", 1)<caret>
+}