Implement the GET_ENTITY method for the SalesOrder entity. Since the only sales order items returned are those in the context of a specific sales order, you first implement reading a specific sales order using the GET_ENTITY method.

1. Scroll down to the SALESORDER_GET_ENTITY method, place the cursor in the row, and click Redefine.
2. Implement the method using this code:

   method SALESORDERS_GET_ENTITY.
   DATA: lt_keys TYPE /IWBEP/T_MGW_TECH_PAIRS,
   ls_key TYPE /IWBEP/S_MGW_TECH_PAIR,
   ls_so_id type BAPI_EPM_SO_ID,
   lv_so_id(10) type N.
   lt_keys = IO_TECH_REQUEST_CONTEXT->GET_KEYS( ).
   READ TABLE lt_keys with key name = 'SO_ID' INTO ls_key.
   lv_so_id = ls_key-value.
   ls_so_id-so_id = lv_so_id.
   CALL FUNCTION 'BAPI_EPM_SO_GET_DETAIL'
   EXPORTING
   SO_ID = ls_so_id
   IMPORTING
   HEADERDATA = er_entity
   * TABLES
   * CONTACTDATA =
   * RETURN = lt_return
   .
   endmethod.

   The BAPI function BAPI_EPM_SO_GET_DETAIL returns the sales order header information by passing in the SO_ID key.

3. Click the Activate icon.
   
   
   
   
4. If you see any warnings, recheck the code, correct any mistakes, then click Activate again.
5. Click Back to return to the Class Interface screen.