The param and the javadoc do not match in org.zkoss.zk.ui.event.ErrorEvent

/** Constructs an error-relevant event.

• @param val the new value that caused the error
• @param oldValue the previous value.
• @param msg the error message if not null. If null, it means the
• error (notified by previous {@link ErrorEvent}

  ) is cleared.

• @since 5.0.4
  */
  public ErrorEvent(String name, Component target, String val, Object oldValue, String msg) { super(name, target, val, oldValue); _msg = msg; }