@staticmethod
def margins_func(widget_item):
    """ Get the margins for the given widget item.

        The container margins are added to the user provided padding
        to determine the final offset from a layout box boundary to
        the corresponding content line. The default container margins
        are zero. This method can be reimplemented by subclasses to
        supply different margins.

        Returns
        -------
        result : tuple
            A 4-tuple of margins (top, right, bottom, left).

        """
    return 0, 0, 0, 0
