gs-core 1.3-Snapshot recently changes (View, Viewer)

[<klaus.pichler AT stud.unileoben.ac.at>]

Hallo,

I have a java maven project running with the dependency: 
<dependency>
    <groupId>org.graphstream</groupId>
    <artifactId>gs-core</artifactId>
    <version>1.3-Snapshot</version>
</dependency> 

My Code for the Visualisation looks like this:
Viewer viewer = new Viewer(myGraph,
                                
Viewer.ThreadingModel.GRAPH_IN_ANOTHER_THREAD);
View view = viewer.addDefaultView(false);
myPanel.add(view,BorderLayout.CENTER);

I showed my graph in a own Frame... (also added same mouselistener to the 
view,
and used view.getCamera().setViewCenter(..) to move around the graph, but that
isn't important here)
My Application works long time fine, till the latest update of the artefact
gs-core 1.3-Snapshot. It seems like, that the classes View and Viewer didnt
exist any more (or they are just renamed or something...) Code doesnt compile
anymore.
Is there any chance, to get this Code running again? (I still want to use the
latest maven artefacts)

Best regards,
Klaus