anchor.diff:  type CommerceLineItem {
     artwork: Artwork
     artworkId: String!
  +  artworkOrEditionSet: ArtworkOrEditionSetType
     artworkVersion: ArtworkVersion
     artworkVersionId: String!
     commissionFee(
  
positive.code:   isOfferable: Boolean
    isSold: Boolean
    listPrice: ListPrice
    saleMessage: String
  
    # size bucket assigned to an artwork based on its dimensions
  
negative.code:     shallow: Boolean
    ): Partner
    pickupAvailable: Boolean
    price: String
    priceCurrency: String
    priceIncludesTax: Boolean
    priceIncludesTaxDisplay: String
  