registerAction(fFindImplementorsInProjectAction, provider, selection);
	public ImplementorsSearchGroup(IWorkbenchSite site) {		fSite= site;		fGroupId= IContextMenuConstants.GROUP_SEARCH;		fFindImplementorsAction= new FindImplementorsAction(site);		fFindImplementorsInWorkingSetAction= new FindImplementorsInWorkingSetAction(site);		// register the actions as selection listeners		ISelectionProvider provider= fSite.getSelectionProvider();		ISelection selection= provider.getSelection();		registerAction(fFindImplementorsAction, provider, selection);		registerAction(fFindImplementorsInWorkingSetAction, provider, selection);	}