I am trying to integrate qlik sense objects into my web app using mashup API. There are few objects which we want to pull together and place it into our web page. I want to fetch two different object as single object using qlik.getObject method.
Yes you can create a composite object however that won't help you in this case.
If you wish to include 2 charts you would have to call app.getObject() twice, getting a composite object would only get you the chart model while getObject() will also insert the necessary chart components into the DOM.