def set_top_margin(self, top_margin):
        """
        Set the top margin of the menu.  This will determine the number of console lines between the top edge
        of the screen and the top menu border.
        :param top_margin: an integer value
        """
        self.__header.style.margins.top = top_margin
        return self
def set_top_margin ( self , top_margin ) : self . __header . style . margins . top = top_margin return self
Set the top margin of the menu.  This will determine the number of console lines between the top edge
        of the screen and the top menu border.
        :param top_margin: an integer value