@Override
  public String render() {
    JSONObject o = new JSONObject();
    try {
      if (sessionId != null) {
        o.put("sessionId", sessionId);
      }
      o.put("status", status);
      if (value != null) {
        o.put("value", value);
      }
    } catch (JSONException e) {
      System.out.println("Cannot render response: " + e.getMessage());
    }
    return o.toString();
  }
It is currently hard to detect whether a test failed because of a legitimate
error by a developer or because something is going wrong in selendroid
internals. This response marks error responses from the server that indicate
something has gone wrong in the internals of selendroid.
selendroid-server-common/src/main/java/io/selendroid/server/common/SelendroidResponse.java