LocalVariable mark = context.markLocalVariables();
LocalVariable mark = context.markLocalVariables(false);
    public void analyze(Expression parent, int flags, OrderSpec orderBy[]) throws XPathException {        LocalVariable mark = context.markLocalVariables();		context.declareVariable(new LocalVariable(QName.parse(context, varName, null)));				inputSequence.analyze(this, flags);		returnExpr.analyze(this, flags);				context.popLocalVariables(mark);    }