code: public VacuumConsumableStatus consumableStatus() throws CommandExecutionException {
          JSONArray resp = sendToArray("get_consumable");
          JSONObject stat = resp.optJSONObject(0);
          if (stat == null) throw new CommandExecutionException(CommandExecutionException.Error.INVALID_RESPONSE);
          return new VacuumConsumableStatus(stat);
      }
docs: Get the vacuums consumables status.
  @return The consumables status.
  @throws CommandExecutionException When there has been a error during the communication or the response was invalid.