title: Get nested JSON object with GSON using retrofit
body: <p>I'm consuming an API from my android app, and all the JSON responses are like this:</p>
  
  <pre><code>{
      'status': 'OK',
      'reason': 'Everything was fine',
      'content': {
           &lt; some data here &gt;
  }
  </code></pre>
  
  <p>The problem is that all my POJOs have a <code>status</code>, <code>reason</code> fields, and inside the <code>content</code> field is the real POJO I want.</p>
  
  <p>Is there any way to create a custom converter of Gson to extract always the <code>content</code> field, so retrofit returns the appropiate POJO?</p>