anchor.diff:  
   # Order
   interface CommerceOrder {
  +  artsyRemitsTaxes: Boolean
     buyer: CommerceOrderPartyUnion!
     buyerDetails: OrderParty
     buyerPhoneNumber: String
  
positive.code: }
  
  type CommerceBuyOrder implements CommerceOrder {
    buyer: CommerceOrderPartyUnion!
    buyerDetails: OrderParty
    buyerPhoneNumber: String
  
negative.code: }
  
  type CommerceOfferOrder implements CommerceOrder {
    artsyRemitsTaxes: Boolean
    awaitingResponseFrom: CommerceOrderParticipantEnum
    buyer: CommerceOrderPartyUnion!
  
  