Problem if there are multiple Callback parameters

[JSUYA]

The app_control_send_launch_request_async() API has two callback parameters.

  int app_control_send_launch_request_async(
    app_control_h app_control,
    app_control_result_cb result_cb,
    app_control_reply_cb reply_cb,
    ffi.Pointer<ffi.Void> user_data,
  ) {
    return _app_control_send_launch_request_async(
      app_control,
      result_cb,
      reply_cb,
      user_data,
    );
  }

If this API is implemented using tizen_interop_callbacks, only one interopUserData can be set.
Additionally, I checked that only the Callback with interopUserData set is invoked.

import 'dart:ffi';
import 'package:tizen_interop/9.0/tizen.dart';
import 'package:tizen_interop_callbacks/tizen_interop_callbacks.dart';

  static final TizenInteropCallbacks _callbacks = TizenInteropCallbacks();

  static void _resultCallback(
    app_control_h request,
    int result,
    Pointer<Void> user_data,
  ) {
    debugPrint(
      '_resultCallback result=${tizen.get_error_message(result).toDartString()}',
    );
  }

  static void _replyCallback(
    app_control_h request,
    app_control_h reply,
    int result,
    Pointer<Void> user_data,
  ) {
    debugPrint('_replyCallback result=$result');
  }

  static Future<bool> launch(String appId) async {
    return using((Arena arena) {
      final appControlPtr = arena<app_control_h>();
      int ret = tizen.app_control_create(appControlPtr);
      if (ret != 0) {
        debugPrint(
          'Failed to app_control_create: ret=$ret, ${tizen.get_error_message(ret).toDartString()}',
        );
      }

      tizen.app_control_set_operation(
        appControlPtr.value,
        APP_CONTROL_OPERATION_DEFAULT.toNativeChar(allocator: arena),
      );
      tizen.app_control_set_app_id(
        appControlPtr.value,
        appId.toNativeChar(allocator: arena),
      );

      final resultCallback = _callbacks.register<app_control_result_cbFunction>(
        'app_control_result_cb',
        Pointer.fromFunction(_resultCallback),
        userObject: nullptr,
        blocking: false,
      );

      final replyCallback = _callbacks.register<app_control_reply_cbFunction>(
        'app_control_reply_cb',
        Pointer.fromFunction(_replyCallback),
        userObject: nullptr,
        blocking: false,
      );

      ret = tizen.app_control_send_launch_request_async(
        appControlPtr.value,
        resultCallback.interopCallback,
        replyCallback.interopCallback,
        resultCallback.interopUserData,  // Only called resultCallback
        // replyCallback.interopUserData,  // Only called replyCallback
      );

      debugPrint(
        'app_control_send_launch_request_async: ret=$ret, ${tizen.get_error_message(ret).toDartString()}',
      );

      return true;
    });
  }