docs: function (obj1, obj2, optMsg) {
                  var diff = ariaUtilsJson.equalsDiff(obj1, obj2);
                  var equals = diff.equals;
                  if (!equals && !optMsg) {
                      var jsonOptions = {
                          indent : "   "
                      };
                      var s1 = ariaUtilsJson.convertToJsonString(diff.left, jsonOptions);
                      var s2 = ariaUtilsJson.convertToJsonString(diff.right, jsonOptions);
                      optMsg = "JSON comparison failed. First object diff:<br><code><pre>" + s1
                              + "</pre></code><br>Second object diff:<br><code><pre>" + s2 + "</pre></code>";
                  }
                  this.assertTrue(equals, optMsg);
              }