def balancing_offer(self, price, energy, seller):
offer = BalancingOffer('id', price, energy, seller)
self.created_balancing_offers.append(offer)
offer.id = 'id'
return offer
def balancing_offer(self, price, energy, seller, market=None):
offer = BalancingOffer('id', now(), price, energy, seller, market)
self.created_balancing_offers.append(offer)
offer.id = 'id'
return offer