HasConcreteContacts

interface HasConcreteContacts : HasContracts

cityMap	`abstract val cityMap: CityMap`
consumes	`abstract val consumes: MutableMap<Tradeable, Int>`
contracts	`abstract val contracts: MutableList<Contract>`
produces	`abstract val produces: MutableMap<Tradeable, Int>`

addContract	`open fun addContract(contract: Contract): Unit`
consumesQuantity	`open fun consumesQuantity(tradeable: Tradeable): Int`
currentQuantityForSale	`open fun currentQuantityForSale(tradeable: Tradeable): Int`
currentQuantityWanted	`open fun currentQuantityWanted(tradeable: Tradeable): Int`
hasAnyContracts	`open fun hasAnyContracts(): Boolean`
producesQuantity	`open fun producesQuantity(tradeable: Tradeable): Int`
productList	`open fun productList(): List<Tradeable>`
summarizeContracts	`open fun summarizeContracts(): String`
totalBeingBought	`open fun totalBeingBought(tradeable: Tradeable): Int`
totalBeingSold	`open fun totalBeingSold(tradeable: Tradeable): Int`
voidContractsWith	`open fun voidContractsWith(otherEntity: TradeEntity): Unit`
voidRandomContract	`open fun voidRandomContract(): Unit`

open fun needsAnyContracts(): Boolean

abstract class Building : HasConcreteInventory, HasConcreteContacts

The basic unit of simulation in this game. Represents a building and all its attributes. We currently count Road as building as well as PowerLine.