anchor.diff:  
     # Home screen content
     homePage: HomePage
  +  job(id: ID!): Job!
  +  jobs: [Job!]!
     marketingCollections(
       artistID: String
       category: String
  
positive.code:     # The ID of the Credit Card
      id: String!
    ): CreditCard
  
    # A namespace external partners (provided by Galaxy)
    external: External!
  
negative.code: 
  # An ISO 8601-encoded datetime
  scalar ISO8601DateTime
  
  type Job {
    # HTML of job listing
    content: String!
  
    # The url of the job listing on Greenhouse
    externalURL: String!
    id: ID!
    location: String!
    title: String!
    updatedAt(
      format: String
  
      # A tz database time zone, otherwise falls back to "X-TIMEZONE" header. See
      # http://www.iana.org/time-zones,
      # https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
      timezone: String
    ): String
  }
  
  # Represents untyped JSON
  scalar JSON
  