<BUG>public AbstractContentNode visit(VolumeSystem vs) {throw new UnsupportedOperationException("No Node defined for VolumeSystems.");</BUG><CONTEXT>@Overridepublic AbstractContentNode visit(Volume volume) {return new VolumeNode(volume);}@Override<extra_id_0>}}</CONTEXT>
protected Node[] createNodes(DisplayableItem key) {return new Node[]{key.accept(new CreateNodeVisitor())};