PlatformUtil constructor
      
      PlatformUtil({ 
    
    
- required BinaryMessenger messenger,
Implementation
PlatformUtil({required BinaryMessenger messenger}) {
  this._messenger = messenger;
  channel = MethodChannel(
    'com.pichillilorenzo/flutter_inappwebview_platformutil',
    const StandardMethodCodec(),
    _messenger,
  );
  handler = _handleMethod;
  initMethodCallHandler();
}