code: static final JsArrayMixed newToolbarGroup(String name, ToolbarButton... buttons) {
          JsArrayString arr = JavaScriptObject.createArray().cast();
          for (ToolbarButton button : buttons) {
              arr.push(button.getId());
          }
          return getToolbarGroup(name, arr);
      }
docs: Creates a new toolbar group.
  
  @param name
  @param buttons
  @return