anchor.diff:    # A list of authenticated external services
     authentications: [AuthenticationType!]!
   
  +  # A list of the current user's bank accounts
  +  bankAccounts(after: String, before: String, first: Int, last: Int): BankAccountConnection
  +
     # Returns a single bidder position
     bidderPosition(id: String!): BidderPositionResult
   
  
positive.code: 
    # Deletes an image from an artwork in my collection
    deleteArtworkImage(input: DeleteArtworkImageInput!): DeleteArtworkImagePayload
  
    # Remove a credit card
    deleteCreditCard(input: DeleteCreditCardInput!): DeleteCreditCardPayload
  
negative.code:   last4: String!
  }
  
  # A connection to a list of items.
  type BankAccountConnection {
    # A list of edges.
    edges: [BankAccountEdge]
  
    # Information to aid in pagination.
    pageInfo: PageInfo!
  }
  
  # An edge in a connection.
  type BankAccountEdge {
    # A cursor for use in pagination
    cursor: String!
  
    # The item at the end of the edge
    node: BankAccount
  }
  
  type BankAccountMutationFailure {
    mutationError: GravityMutationError
  }
  
  type BankAccountMutationSuccess {
    bankAccount: BankAccount
    bankAccountEdge: BankAccountEdge
  }
  
  union BankAccountMutationType = BankAccountMutationFailure | BankAccountMutationSuccess
  
  type Bidder implements Node {
    createdAt(
      format: String
  