package Ġcom . sw iss chain . matching . engine . database Ċ Ċ import Ġcom . sw iss chain . matching . engine . da os . Limit Order Ċ Ċ interface ĠOrder Book Database Accessor Ġ{ ĊĠĠĠ Ġfun Ġload Limit Orders (): ĠList < Limit Order > ĊĠĠĠ Ġfun Ġupdate Order Book ( asset : ĠString , Ġis Buy : ĠBoolean , Ġorder Book : ĠCollection < Limit Order >) Ċ }