private List<IContainer> _designResources;
public WGADesignViewerFilter(IProject selection) {
_selectedProject = selection;
_designResources = WGADesignStructureHelper.retrieveDesignResources(new ResourceFilter() {
public boolean accept(IResource resource) {
IProject project = resource.getProject();
if (project != null) {
if (!project.isAccessible()) {