def apply_style(self, cmd, *args):
        """
        Apply the specified style cmd to this region. For example, set all fonts to size 12, apply_style('FONTSIZE', 12)
        :param cmd: reportlab  format command
        :param args: arguments for the cmd
        :return: self
        """
        for c0, c1 in self.col_coord_tuples:
            for r0, r1 in self.row_coord_tuples:
                c = [cmd, (c0, r0), (c1, r1)] + list(args)
                self.style_cmds.append(c)
        return self
Apply the specified style cmd to this region. For example, set all fonts to size 12, apply_style('FONTSIZE', 12)
        :param cmd: reportlab  format command
        :param args: arguments for the cmd
        :return: self