throw new IllegalStateException ("builder already installed");
throw new IllegalStateException ("object factory builder already installed");
  public static void setObjectFactoryBuilder (ObjectFactoryBuilder builder)    throws NamingException  {    SecurityManager sm = System.getSecurityManager ();    if (sm != null)      sm.checkSetFactory ();    // Once the builder is installed it cannot be replaced.    if (ofb != null)      throw new IllegalStateException ("builder already installed");    if (builder != null)      ofb = builder;  }