anchor.diff:      project: Project
   }
   
  +class PaperclipForOrder #lightgreen {
  +
  +}
  +
   Order <--> "0..*" OrderItem
   
   
   Party "buyer" <-- Order
   Party "seller" <-- Order
   
  +
  +Document <-- "0..1         " PaperclipForOrder
  +Order <-- PaperclipForOrder
   
   
   
  
positive.code: class OrderItemInvoiceItemLink #pink {
  
  }
  
  IncomingInvoiceItem <--- OrderItemInvoiceItemLink
  OrderItem <--- OrderItemInvoiceItemLink
  
negative.code: 
  }
  
  class PaperclipForBankAccount #lightgreen {
  
  }
  
  
  
  
  class IncomingInvoiceItem #pink  implements FinancialItem  {
  