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#This file is part sale_invoice_cancel module for Tryton.
#The COPYRIGHT file at the top level of this repository contains
#the full copyright notices and license terms.
from trytond.model import ModelView, Workflow
from trytond.pool import Pool, PoolMeta
__all__ = ['Invoice']
__metaclass__ = PoolMeta
class Invoice:
__name__ = 'account.invoice'
@classmethod
@ModelView.button
@Workflow.transition('draft')
def draft(cls, invoices):
'''Available cancel invoices from purchase'''
pass