code: def get_raw_data(self):
          
          if self.__report_kind != HidP_Output \
                  and self.__report_kind != HidP_Feature:
              raise HIDError("Only for output or feature reports")
          self.__prepare_raw_data()
          #return read-only object for internal storage
          return helpers.ReadOnlyList(self.__raw_data)
docs: Get raw HID report based on internal report item settings,
          creates new c_ubytes storage