mo_tor_srv->retrieve_by_association(
      EXPORTING
        it_key              = lt_item_tr_keys
        iv_node_key         = /scmtms/if_tor_c=>sc_node-item_tr
        iv_association      = /scmtms/if_tor_c=>sc_association-item_tr-bo_driver
      IMPORTING
        et_target_key       = DATA(lt_driver_key)
        et_data             = lt_driver ).