title: JSONObject always returns "empty": false
body: <p>There is a Spring Rest Controller :</p>
  
  <pre><code>@RestController
  @RequestMapping("secanalytique")
  public class SectionAnalytiqueController {
  
      @GetMapping(value = "/sectionbyaxepro/{codecomp}", produces = "application/json")
      public JSONObject getByAxePro(@PathVariable String codecomp) {
          JSONObject jsonModel = new JSONObject();
          jsonModel.put("cce0","frityyy");
          return jsonModel;
      }
  
  }
  </code></pre>
  
  <p>I made a test with Postman : <a href="http://172.20.40.4:8080/Oxalys_WS/secanalytique/sectionbyaxepro/8" rel="noreferrer">http://172.20.40.4:8080/Oxalys_WS/secanalytique/sectionbyaxepro/8</a> ; and what I got is always </p>
  
  <pre><code>{
      "empty": false
  }
  </code></pre>
  
  <p>So what is wrong ?</p>