docs: def callback_trigger(msg, arg):
      """Called when the kernel is done scanning. Only signals if it was successful or if it failed. No other data.
  
      Positional arguments:
      msg -- nl_msg class instance containing the data sent by the kernel.
      arg -- mutable integer (ctypes.c_int()) to update with results.
  
      Returns:
      An integer, value of NL_SKIP. It tells libnl to stop calling other callbacks for this message and proceed with
      processing the next kernel message.
      """
      gnlh = genlmsghdr(nlmsg_data(nlmsg_hdr(msg)))
      if gnlh.cmd == nl80211.NL80211_CMD_SCAN_ABORTED:
          arg.value = 1  # The scan was aborted for some reason.
      elif gnlh.cmd == nl80211.NL80211_CMD_NEW_SCAN_RESULTS:
          arg.value = 0  # The scan completed successfully. `callback_dump` will collect the results later.
      return libnl.handlers.NL_SKIP