public void clear(Order ask, Order bid, double buyerCharge, double sellerPayment, int quantity) {
assert ask.isAsk();
assert bid.isBid();
recordMatch(ask, bid);
market.clear(ask, bid, buyerCharge, sellerPayment, quantity);
}
public void clear(Order ask, Order bid, double price) {
assert ask.isAsk();
assert bid.isBid();
recordMatch(ask, bid);
market.clear(ask, bid, price);
}