New J2K: Make method open only if parent class is open

nj2k/src/org/jetbrains/kotlin/nj2k/conversions/ModalityConversion.kt

@@ -37,11 +37,13 @@ class ModalityConversion(private val context: ConversionContext) : RecursiveAppl
 
     private fun processMethod(method: JKJavaMethod) {
         val psi = method.psi<PsiMethod>()!!
+        val containingClass = method.parentOfType<JKClass>()
         method.modality = when {
             method.modality != Modality.ABSTRACT
                     && (method.psi!! as PsiMethod).findSuperMethods().isNotEmpty() -> Modality.OVERRIDE
             method.modality == Modality.OPEN
                     && context.converter.settings.openByDefault
+                    && containingClass?.modality == Modality.OPEN
                     && method.visibility != Visibility.PRIVATE -> Modality.OPEN
 
             method.modality == Modality.OPEN