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1. Create a custom implementation class based on the IQX Adapter base class:
   1. Use the Class Builder in SAP (t-code SE24) to open the class /IQX/CL_SAP_WL_ADPT.
   2. From the menu bar, select Edit → Create Subclass.
   3. Enter the name of the subclass in the Class field.
      • e.g. ZCL_OL_PO_ADAPTER
   4. Enter a short description in the Description field.
      • e.g. Purchase Order adapter for OneList
   5. Choose Save.
   6. Enter the Package and choose Save again.
      
      
2. Redefine the following inherited methods (click on the method for the implementation example):
   1. EXECUTE_ACTION
   2. GET_ATTCHMENT_CONTENT
   3. GET_OBJECT_DETAILS
      
      
3. Create the new methods (called by GET_OBJECT_DETAILS) to retrieve the correct PO information, as well as set up the Action buttons in OneList:
   1. GET_PO_DETAIL
   2. GET_PO_ACTION
4. Check, Save and Activate the implementation class.

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