SchemaParticle currentParticle() 
{
            assert _visitor != null;
            return _visitor.currentParticle();
}

 boolean end() 
{
            return !_canHaveElements || _visitor.visit( null );
}

 boolean test(QName name) 
{
            return _canHaveElements && _visitor.testValid( name );
}

 boolean visit(QName name) 
{
            return _canHaveElements && _visitor.visit( name );
}