Ember first application wont recognize xmlcode inside xml2json

Sorry if this problem could be because my lack of knowledge in node/npm area.

I created my first ember webapplication

I install xml2json with npn and bower and added

app.import('node_module/xml2json/xml2json.js') 

in ember_build_cli.js before return app.toTree();

I added custom route via generate and added a function that should read xml, convert it to json and output data

/myapp/app/routes/getxml.js

import Ember from 'ember';
export default Ember.Route.extend({
model() {
  return Ember.$.ajax({
   url: "data/test.xml",
    dataType:"xml"
  }).done(function(xmlData){
      var jsonData = xml2json.xml_to_object(xmlData);
      return jsonData;
 });
}
});

/myapp/app/data/test.xml

<ART>
<CD>
<ID>1</ID>
</CD>
<CD>
<ID>2</ID>
</CD>
</ART>

I have a problem that xml2json dont work. As I was able to install Ember Inspector inside Firefox I end up with this error:

TypeError: xmlcode.replace is not a function

As I understand the xml2json is imported correctly but Ember/Firefox don't understand code xmlcode.replace inside xml2json library.

Did I miss something when installing application or im doing something wrong?

EDIT:

After creating app from start and installing xml2json only via bower install adding

app.import('bower_components/xml2json/xml2json.js')

in /myapp/ember-cli-build.js when running ember server I see

routes/getxml.js: line 9, col 22, 'xml2json' is not defined

but in Firefox Dev Console i see:

XML Parsing Error: syntax error Location: http://localhost:4200/getxml Line Number 1, Column 1:

And nothing more. And now im unsure if xml2json is loaded (because there is XML parse error) or is not as ember cli state is not defined.

Edit3:

/myapp/app/routes/getxml.js

    import Ember from 'ember';

    export default Ember.Route.extend({
    model() {
      return Ember.$.ajax({
       url: "http://127.0.0.1/GetXML.xml",
       dataType: 'xml'
  }).done(function(xmlData){
    var jsonData = xml2json.xml_to_object(JSON.stringify(xmlData));
    console.log('result', jsonData);
    return jsonData;
  }).fail(function(error){
    console.log('error ', error);
  });
}
});

Print results as undefined in Console inside Firefox Console.