Converter:

Functions are final by default in plugin mode

j2k/tests/testData/ast/issues/kt-696.ide.kt

@@ -1,12 +1,12 @@
 package test
 class Base() {
-public open fun hashCode() : Int {
+public fun hashCode() : Int {
 return System.identityHashCode(this)
 }
-public open fun equals(o : Any) : Boolean {
+public fun equals(o : Any) : Boolean {
 return this.identityEquals(o)
 }
-public open fun toString() : String {
+public fun toString() : String {
 return getJavaClass<Base>.getName() + '@' + Integer.toHexString(hashCode())
 }
 }