Does anyone know how to suppress only one message using Google FC api?

For example, I would like to suppress the ad-block message if a certain condition is met. Something similar to this pseudo-example. However, message.proceed(false) blocks all messages, not just the ad-block message. Does anyone have any ideas?

Thanks

googlefc.controlledMessagingFunction = (message) => {
  if (isSubscriber) {
    message.proceed(false);
  } else {
    message.proceed(true);
  }
}