@Override
public List<? extends Site2SiteVpnServiceProvider> getSite2SiteVpnElements() {
List<Site2SiteVpnServiceProvider> elements = new ArrayList<Site2SiteVpnServiceProvider>();
for (NetworkElement element : _networkElements) {
if (element instanceof Site2SiteVpnServiceProvider) {
Site2SiteVpnServiceProvider e = (Site2SiteVpnServiceProvider) element;
elements.add(e);
}
}
return elements;