rv = _dispatchStem(act, stem, extn);
rv = _dispatchStem(tokens);
  private static boolean _dispatch(                            String cat, String act,                            String stem, String extn                         )  {    boolean rv = false;    if        (cat.equals("group")) {      rv = _dispatchGroup(act, stem, extn);    } else if (cat.equals("stem")) {      rv = _dispatchStem(act, stem, extn);    } else {      System.err.println("ERROR: Invalid category: `" + cat + "'");    }    return rv;  }