Save As Dialog in Ext Js

I want to ask if there is a "Save As" dialog in Ext Js Modern? So I can save an Object from a web Page into a local file.

Another solution depends on the Portlet Concept:

1. in ViewController you fire an event ex "downloadFile"
2. in Main Controller you catch the event and execute a function "downloadFile" and call a function in let it the same name

3. AjaxController (Ext.app.Controller) you call the function doStandardSubmit

   location.href = this.url + '&operation=download&param1=' + param1val;

4. in the Backend of the portlet (Java) you write the endPOint method :

   @EndpointMethod(encode = false) public void download(DataAccessor dataAccessor, AuthenticationGenerationConfiguration configuration, @RequestKey String param1, ResourceResponse response) throws IOException {

   OutputStream outputStream = response.getPortletOutputStream(); try {

               // Adjusting content type
               response.setContentType("text/plain");
               response.setProperty("Content-Disposition", "attachment; filename=\"" + FILENAME + "\"");
                   outputStream.flush();
           } finally {
               outputStream.close();
           }
       }