@Override
        protected void visitXPathExpression(XPathExpression expr) {
            if (expr != myExpression) {
                if (isAccepted(expr) && isEquivalent(expr, myExpression)) {
                    myList.add(expr);
                } else {
                    superVisitElement(expr);
                }
            }
        }
@Override
        protected void visitXPathExpression(XPathExpression expr)