Sequence Diagram

@Lambda OrderController
<<BFF>> OrderService
group BusinessService {
  PurchaseService
  InvoiceService
}
//`POST /orders`
OrderController.create(payload1234) {
  OrderService.create(payload) {
    order = new Order(payload)
    par {
      PurchaseService.createPO(order)
      InvoiceService.createInvoice(order)      
    }
  }
}