_lowerClassMap.put(name.toLowerCase(), cl);
if (! isStrict()) _lowerClassMap.put(name.toLowerCase(), cl);
  public void addClass(String name, QuercusClass cl)  {    /*    QuercusClass oldClass = findClass(name);    if (oldClass != null) {      throw new Exception(L.l("can't redefine function {0}", name));    }    */    _classMap.put(name, cl);    _lowerClassMap.put(name.toLowerCase(), cl);  }