list_membership_line = []
member_line_obj = self.pool.get('membership.membership_line')
for order in self.pool.get('pos.order').browse(cr, uid, ids, context=context):
list_membership_line = []
member_line_obj = self.pool.get('membership.membership_line')
for order in self.pool.get('pos.order').browse(cr, uid, ids, context=context):