aeron-samples/src/main/java/io/aeron/samples/MultipleSubscribersWithFragmentAssembly.java
public static void eventUnavailableImage(final Image image)
    {
        final Subscription subscription = image.subscription();
        System.out.format(
            "inactive image on %s streamId %d sessionId %x%n",
            subscription.channel(), subscription.streamId(), image.sessionId());
    }
public static void eventUnavailableImage(final Image image)
    {
        final Subscription subscription = image.subscription();
        System.out.format(
            "inactive image on %s streamId %d sessionId %x%n",
            subscription.channel(), subscription.streamId(), image.sessionId());
    }
This handler is called when image is unavailable

@param image that has gone inactive