rs on all nodes. In this
            case the affected eventsourced actor is an (already active) OrderActor with the same aggregate-id.</li>
        <li>It tracks causality of events, i.e. it ensures that an event that
            <a href="http://rbmhtechnology.github.io/eventuate/user-guide.html#detecting-concurrent-updates"><em>is known</em></a>
            to has
            happened before another event is consumed by all <em>affected</em> actors' <code>onEvent</code>-handler
            before the othe