[JS IR] Set proper visibility for static stub of private members

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrPropertyReferenceImpl
 import org.jetbrains.kotlin.ir.util.deepCopyWithSymbols
+import org.jetbrains.kotlin.ir.util.isLocal
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.name.Name
 
@@ -48,11 +49,13 @@ class PrivateMembersLowering(val context: JsIrBackendContext) : DeclarationTrans
     private fun transformMemberToStaticFunction(function: IrSimpleFunction): IrSimpleFunction? {
 
         if (function.visibility != DescriptorVisibilities.PRIVATE || function.dispatchReceiverParameter == null) return null
+        val newVisibility = if (function.isLocal) DescriptorVisibilities.LOCAL else function.visibility
 
         val staticFunction = context.irFactory.buildFun {
             updateFrom(function)
             name = function.name
             returnType = function.returnType
+            visibility = newVisibility
         }.also {
             it.parent = function.parent
             it.correspondingPropertySymbol = function.correspondingPropertySymbol