res['fields']['invoice_state']={'string':_('Invoice state'),'type':'selection','required':True,'selection':[('2binvoiced',_('To Be Invoiced')),('none',_('None'))]}
res['fields']['invoice_state']={'string':_('Invoicing'),'type':'selection','required':True,'selection':[('2binvoiced',_('To be refunded/invoiced')),('none',_('No invoicing'))]}