public override TResult Accept <TResult>(IParseTreeVisitor <TResult> visitor)
        {
            IOutputVisitor <TResult> typedVisitor = visitor as IOutputVisitor <TResult>;

            if (typedVisitor != null)
            {
                return(typedVisitor.VisitText(this));
            }
            else
            {
                return(visitor.VisitChildren(this));
            }
        }
 public OutputVisitorResult Accept(IOutputVisitor visitor)
 {
     return(visitor.Visit(this));
 }