title: How to navigate in a flattened structure firebase with FirebaseRecyclerViewAdapter
body: <p>I need navigate in a flattened firebase structure and get data and charge a recycler view</p>
  
  <p>This is a sample structure of firebase</p>
  
  <p><strong>Report.json structure:</strong></p>
  
  <pre><code>{
     "time_stamp_id_report": {
      "description": "uma descrição aqui",
      "title": "Um titulo aqui"
     }
   }
  </code></pre>
  
  <p>And this is my adapter </p>
  
  <pre><code>FirebaseRecyclerAdapter&lt;Report, ViewHolderReport&gt; adapter = new FirebaseRecyclerAdapter&lt;Report, ViewHolderReport&gt;(Report.class,
      R.layout.layout_report_card_list, ViewHolderReport.class, ref) {
      @Override
      protected void populateViewHolder(ViewHolderReport viewHolderReport, Report r, int i) {
          viewHolderReport.nameReport.setText(r.getTitle());
      }
  };
  </code></pre>
  
  <p>Works fine. But now I have this flattened structure:</p>
  
  <p><strong>Report.json structure</strong></p>
  
  <pre><code>{
    "time_stamp_id_report": {
      "description": "uma descrição aqui",
      "image": {
        "image1": true,
        "image2 ": true
      },
      "title": "Um titulo aqui"
    }
  }
  </code></pre>
  
  <p><strong>Images.json structure</strong></p>
  
  <pre><code>{
    "image1": {
      "value": "qiwuhqweouhfqwofe"
    },
    "image2": {
      "image": "quwerhqiweurqhwieurqhwei"
    }
  }
  </code></pre>
  
  <p>So, how can I get the image value in the adapter of reports?</p>