def __init__(self, box_widget, height):
        if hasattr(box_widget, 'sizing') and BOX not in box_widget.sizing():
            raise BoxAdapterError("%r is not a box widget" %
                box_widget)
        WidgetDecoration.__init__(self,box_widget)

        self.height = height
Create a flow widget that contains a box widget
dataset/ETHPy150Open AnyMesh/anyMesh-Python/example/urwid/decoration.py/BoxAdapter.__init__