anchor.diff:    # `LOGGED_IN` because we don't know whether or not the authentication is valid
     # (error could be something else).
     authenticationStatus: AuthenticationStatus!
  +
  +  # A user's bank account
  +  bankAccount(
  +    # The ID of the bank account
  +    id: String!
  +  ): BankAccount
     channel(id: ID!): Channel!
   
     # A list of cities
  
positive.code:   internalID: ID
  }
  
  type YearRange {
    # The last year of the year range
    endAt: Int
  
negative.code:   # `LOGGED_IN` because we don't know whether or not the authentication is valid
    # (error could be something else).
    authenticationStatus: AuthenticationStatus!
  
    # A user's bank account
    bankAccount(
      # The ID of the bank account
      id: String!
    ): BankAccount
    channel(id: ID!): Channel!
  
    # A list of cities
  