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LOOP AT gt_head INTO gw_head.
    CALL FUNCTION 'ICON_CREATE'
      EXPORTING
        name                  = 'ICON_LIST'
        text                  = text-001
        info                  = text-001
      IMPORTING
        result                = gw_head-operate
      EXCEPTIONS
        icon_not_found        = 1
        outputfield_too_short = 2
        OTHERS                = 3.
    MODIFY gt_head FROM gw_head TRANSPORTING operate.
  ENDLOOP.