Markup block - Gen<None> - 36 - (0:0,0)
    Tag block - Gen<TagHelper> - 36 - (0:0,0) - person - PersonTagHelper
        SelfClosing - <person age=" @DateTime.Now.Year" />
        age - DoubleQuotes
            Markup block - Gen<None> - 19 - (13:0,13)
                Markup block - Gen<None> - 19 - (13:0,13)
                    Code span - Gen<Expr> - [ ] - ImplicitExpressionEditHandler;Accepts:AnyExceptNewline;ImplicitExpression[ATD];K14 - (13:0,13) - Tokens:1
                        HtmlTokenType.WhiteSpace;[ ];
                    Expression block - Gen<Expr> - 18 - (14:0,14)
                        Code span - Gen<Expr> - [@] - ImplicitExpressionEditHandler;Accepts:AnyExceptNewline;ImplicitExpression[ATD];K14 - (14:0,14) - Tokens:1
                            CSharpTokenType.Transition;[@];
                        Code span - Gen<Expr> - [DateTime.Now.Year] - ImplicitExpressionEditHandler;Accepts:AnyExceptNewline;ImplicitExpression[ATD];K14 - (15:0,15) - Tokens:5
                            CSharpTokenType.Identifier;[DateTime];
                            CSharpTokenType.Dot;[.];
                            CSharpTokenType.Identifier;[Now];
                            CSharpTokenType.Dot;[.];
                            CSharpTokenType.Identifier;[Year];
