anchor.diff:    # A requested location
     requestLocation(ip: String!): RequestLocation
   
  +  # Search for matching artworks by image
  +  reverseImageSearch(
  +    # Image file
  +    image: Upload!
  +  ): ReverseImageSearchResults
  +
     # A Sale
     sale(
       # The slug or ID of the Sale
  
positive.code:   srcSet: String!
    url: String!
    width: Int
  }
  
  enum Role {
  
negative.code:   # A requested location
    requestLocation(ip: String!): RequestLocation
  
    # Search for matching artworks by image
    reverseImageSearch(
      # Image file
      image: Upload!
    ): ReverseImageSearchResults
  
    # A Sale
    sale(
      # The slug or ID of the Sale
  