code: def make_horizontal_box(cls, children, layout=Layout()):
          "Make a horizontal box with `children` and `layout`."
          return widgets.HBox(children, layout=layoutf make_horizontal_box(cls, children, layout=Layout()):
          "Make a horizontal box with `children` and `layout`."
          return widgets.HBox(children, layout=layout)
docs: Make a horizontal box with `children` and `layout`.