odoo button function

@api.multidef add_optional_setting(self):

// two botton work together    self.add_optional_product()    optional_lines = {}    if self.optional_setting_line_ids:        for opt_line in self.optional_setting_line_ids:            opt_line.unlink()    for line in self.order_line:        for opt_setting in line.product_id.sale_optional_setting_ids:            optional_lines = {                'name':  opt_setting.id,                'optional_setting_value1': opt_setting.optional_value1,                'optional_setting_value2': opt_setting.optional_value2,            }            self.write({                'optional_setting_line_ids': [(0, 0, optional_lines)]            })