docs: private Single<BluetoothGatt> disconnect(BluetoothGatt bluetoothGatt) {
          return new DisconnectGattObservable(bluetoothGatt, rxBleGattCallback, bluetoothInteractionScheduler)
                  .timeout(timeoutConfiguration.timeout, timeoutConfiguration.timeoutTimeUnit, timeoutConfiguration.timeoutScheduler,
                          Single.just(bluetoothGatt));
      }