throw new GrouperShellException();
  public static Set invoke(Interpreter i, CallStack stack, String name)     throws  GrouperShellException  {    try {      GrouperSession  s     = GrouperShell.getSession(i);      Stem            root  = StemFinder.findRootStem(s);      GrouperQuery    gq    = GrouperQuery.createQuery(        s,         new StemNameAnyFilter(name, root)      );      return gq.getStems();    }    catch (QueryException eQ) {      throw new GrouperShellException(eQ);    }  } // protected static Set getStems(i, name)