registerAction(fFindReferencesInProjectAction, provider, selection);
	public ReferencesSearchGroup(IWorkbenchSite site) {		fSite= site;		fGroupId= IContextMenuConstants.GROUP_SEARCH;		fFindReferencesAction= new FindReferencesAction(site);		fFindReferencesInHierarchyAction= new FindReferencesInHierarchyAction(site);		fFindReferencesInWorkingSetAction= new FindReferencesInWorkingSetAction(site);		// register the actions as selection listeners		ISelectionProvider provider= fSite.getSelectionProvider();		ISelection selection= provider.getSelection();		registerAction(fFindReferencesAction, provider, selection);		registerAction(fFindReferencesInHierarchyAction, provider, selection);		registerAction(fFindReferencesInWorkingSetAction, provider, selection);	}