How to receive JmsConnectorState when using RestartSource.withBackoff

Hi.
I’m want to receive the current JmsConnectorState, but how can I receive this if the RestartSource.withBackoff returns NotUsed materialize?
My code:

def jmsSource(): Source[AckEnvelope, JmsConsumerControl] = JmsConsumer.ackSource(
    JmsConsumerSettings(consumerConfig, connectionFactory)
      .withQueue(endpoint)
      .withAcknowledgeMode(if (mqAutoAck) {
        AcknowledgeMode.AutoAcknowledge
      } else {
        AcknowledgeMode.ClientAcknowledge
      })
  )
//  in the following code I want to receive **JmsConsumerControl** instead of **NotUsed**
private[this] val restartSource: Source[AckEnvelope, NotUsed] = RestartSource
    .withBackoff(
      RestartSettings(
        minBackoff = 3.seconds,
        maxBackoff = 10.seconds,
        randomFactor = 0.2 // adds 20% "noise" to vary the intervals slightly
      )
    ) { () =>
      jmsSource()
    }

// and now, for each message I received I want to log the current jms connection state and other actions

restartSource.mapMaterializedValue(....) etc

If some one can help, I would appreciate it.

Thanks,
Asael