@Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        nodeID = ExternalizableUtil.getInstance().readByteArray(in);
        handler = (JID) ExternalizableUtil.getInstance().readSerializable(in);
        ExternalizableUtil.getInstance().readStrings(in, receivers);
    }
List of JIDs with the TO value of the directed presences.
E.g.: paul@js.com or room1@conference.js.com
xmppserver/src/main/java/org/jivesoftware/openfire/handler/DirectedPresence.java