The image shows the left sequence in the Scope_RetrieveQuotes scope expanded in the BPEL Designer. It contains the following activities:
Assign_InternalWarehouseRequest assign activity
Invoke_InternalWarehouse invoke activity
Receive_InternalWarehouse receive activity
Assign_InterWHResponse assign activity
An arrow connects Invoke_InternalWarehouse activity to InternalWarehouseService, and arrow connects InternalWarehouseService to Receive_InternalWarehouse.