anchor.diff:  
     # Home screen content
     homePage: HomePage
  +  job(id: ID!): Job!
  +  jobs: [Job!]!
     marketingCollections(
       artistID: String
       category: String
  
positive.code: 
    # Home screen content
    homePage: HomePage
    marketingCategories: [MarketingCollectionCategory!]!
    marketingCollection(slug: String!): MarketingCollection
    marketingCollections(
  
negative.code:     # The ID of the Credit Card
      id: String!
    ): CreditCard
    departments: [Department!]!
  
    # A namespace external partners (provided by Galaxy)
    external: External!
  