old_contents: # -*- coding: utf-8 -*-
  # Copyright 2016 ACSONE SA/NV
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
  
  from openerp import api, fields, models, _
  
  GROUP_XML_ID = 'account_invoice_check_total.group_supplier_inv_check_total'
  
  
  class AccountConfigSettings(models.Model):
  
      _inherit = 'account.config.settings'
  
      group_supplier_inv_check_total = fields.Boolean(
          string="Check Total on Vendor Bills",
          implied_group=GROUP_XML_ID)
  
new_contents: # -*- coding: utf-8 -*-
  # Copyright 2016 ACSONE SA/NV
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
  
  from openerp import api, fields, models, _
  
  GROUP_XML_ID = 'account_invoice_check_total.group_supplier_inv_check_total'
  
  
  class AccountConfigSettings(models.TransientModel):
  
      _inherit = 'account.config.settings'
  
      group_supplier_inv_check_total = fields.Boolean(
          string="Check Total on Vendor Bills",
          implied_group=GROUP_XML_ID)
  
subject: Use transient model !