anchor.diff:    # Can bids be placed on the artwork?
     isBiddable: Boolean
     isBidOn: Boolean
  +
  +  # Is the user the highest bidder on the sale artwork. (Currently only being used via me.myBids.)
  +  isHighestBidder: Boolean
  +
  +  # Is this sale artwork being watched by a user. (Currently only used on me.myBids and me.watchedLotsConnection.)
  +  isWatching: Boolean
     isWithReserve: Boolean
  +  lot: CausalityLotState
     lotLabel: String
     lowEstimate: SaleArtworkLowEstimate
     minimumNextBid: SaleArtworkMinimumNextBid
  
positive.code:   holdOrError: InventoryHoldOrErrorUnion!
  }
  
  type City {
    coordinates: LatLng
    fairsConnection(
  
negative.code:     last: Int
    ): ArtworkConnection
    associatedSale: Sale
    bidder: Bidder
  
    # A bid increment policy that explains minimum bids in ranges.
    bidIncrements: [BidIncrement]
  