anchor.diff:  const GUID_DEVINTERFACE_HID = '{4D1E55B2-F16F-11CF-88CB-001111000030}';
   
   void main() {
  +  // https://docs.microsoft.com/en-us/windows-hardware/drivers/install/overview-of-device-setup-classes
     using((Arena arena) {
       final deviceGuid = arena<GUID>()..ref.setGUID(GUID_DEVCLASS_NET);
   
  
positive.code: import 'dart:ffi';
  import 'dart:typed_data';
  
  
negative.code:     }
    });
  
    // https://docs.microsoft.com/en-us/windows-hardware/drivers/install/overview-of-device-interface-classes
    using((Arena arena) {
      final interfaceGuid = calloc<GUID>()..ref.setGUID(GUID_DEVINTERFACE_HID);
  
  