public ValidationConsumer (EventConsumer next)
public ValidationConsumer ()
    public ValidationConsumer (EventConsumer next)    {	super (next);	setContentHandler (this);	setDTDHandler (this);	try { setProperty (DECL_HANDLER, this); }	catch (Exception e) { /* "can't happen" */ }	try { setProperty (LEXICAL_HANDLER, this); }	catch (Exception e) { /* "can't happen" */ }    }