anchor.diff:      settingsButton.disabled = false;
     }
   
  -  List<CoreElement> createCheckBox(String name,
  -          [bool checked = false, void handle()]) =>
  +  List<CoreElement> createCheckBox(String name, bool checked, void handle()) =>
         [
           checkbox(
             text: name,
  
positive.code:       ..click(
          _loadAllocationProfile,
          () {
            // TODO(terry): Disable when real binary snapshot is exposed.
            enableExperiment();
  
            // Shift key pressed while clicking on Snapshot button enables live
            // memory inspection will not work in profile build.
            _loadAllocationProfile();
          },
        )
  
negative.code:                 div(c: 'setttings-options-2')
                    ..add([
                      experimentCheckbox = createCheckBox(
                          'Navigation Experiment ',
                          memoryController.settings.experiment, () {
                        // TODO(terry): Brittle but experiments for now.
                        final html.CheckboxInputElement cb =
                            experimentCheckbox.first.element;
                        memoryController.settings.experiment = cb.checked;
                      }),
                      br(), // Settings Option 2 available
                      br(), // Settings Option 3 available
                      br(), // Settings Option 4 available
  