public override void Start()
{
base.Start();
MarketApi.CancelSellOfferRequest(TargetItemModel.SellOfferId, OnSuccessCallback, OnError);
TargetItemModel.IsLockFromServer = true;
TargetItemModel.SetChanges();
}
protected override void Finish()
{
base.Finish();
TargetItemModel.IsLockFromServer = false;
TargetItemModel.SetChanges();
}