@Override
        public boolean onFileDialog(CefBrowser browser,
                                    FileDialogMode mode,
                                    String title,
                                    String defaultFilePath,
                                    Vector<String> acceptFilters,
                                    CefFileDialogCallback callback) {
          return myDialogHandler.handleBooleanFirst(browser, handler -> {
            return handler.onFileDialog(browser, mode, title, defaultFilePath, acceptFilters, callback);
          });
        }
@Override
        public boolean onFileDialog(CefBrowser browser,
                                    FileDialogMode mode,
                                    String title,
                                    String defaultFilePath,
                                    Vector<String> acceptFilters,
                                    CefFileDialogCallback callback)