'Configure the table cell at the given row and column.  Valid
keyword arguments are: ``background``, ``bg``, ``foreground``,
``fg``, ``selectbackground``, ``selectforeground``.'

def itemconfigure(self, row_index, col_index, cnf=None, **kw):

    lb = self._listboxes[col_index]
    return lb.itemconfigure(row_index, cnf, **kw)
