Implement property uses throw UnsupportedOperationException() instead of default value or ?

idea/testData/codeInsight/overrideImplement/overrideFunctionProperty.kt.after

@@ -3,9 +3,9 @@ open class A() {
 }
 
 fun some() : A {
-    return object : A() {<caret>
+    return object : A() {
         override val method: () -> Unit?
-            get() = ?
+            get() = <selection><caret>throw UnsupportedOperationException()</selection>
     }
 }