In-App Purchasing Deprecated API Usage - UIWebView

Hi guys, I using unity 2019.2.17f1 and still getting warning from Apple Deprecated API Usage - Apple will stop accepting submissions of apps that use UIWebView APIs.
I search in Xcode search field “webview” and found something like this :

Il2CppMetadataUsage.c
Classes/Native/Il2CppMetadataUsage.c:extern const uint32_t MoolahStoreImpl_ClosePayWebView_m69321FE5F49ACE555849E874F046FE212CC71C2B_MetadataUsageId;

Stores.cpp
IL2CPP_EXTERN_C IL2CPP_METHOD_ATTR void PayMethod_showPayWebView_m9172B10E5160E863A867127F264B99FA55A774CD (String_t* ___paymentURL0, String_t* ___authGlobal1, String_t* ___transactionId2, String_t* ___hashKey3, String_t* ___customID4, const RuntimeMethod* method);

Stores_CodeGen.c
extern void MoolahStoreImpl_ClosePayWebView_m69321FE5F49ACE555849E874F046FE212CC71C2B ();

I’m using Unity In-app purchasing in Service tab and import the package.

I suspect because this I got warning from Apple about using UIWebView. Need help to fix this, Thank you.

Are you also using Unity Ads by chance? Or just IAP. Those references would not be expected to be included in the binary.

No, I didn’t using Unity Ads. I using Facebook, Firebase, Google Mobile Ads, and Unity In-App Purchasing. I make sure by using Search in Xcode “UIWebView” but didn’t get any result but when I search “WebView”, I found that in the first post.

I don’t understand why Apple didn’t send the detail about this issue like which code that contain UIWebView.