code: public static GridPane getGridPane() {
          GridPane grid = new GridPane();
          grid.setHgap(10);
          grid.setVgap(10);
          grid.setPadding(new Insets(10, 10, 10, 10));
          return grid;
      }
docs: 获取一个{@link GridPane}对象
  
  @return {@link GridPane}