Markup block - Gen<None> - 28 - (0:0,0)
    Markup span - Gen<Markup> - [{  ] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:2
        SyntaxKind.Text;[{];
        SyntaxKind.Whitespace;[  ];
    Directive block - Gen<None> - 24 - (3:0,3)
        Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (3:0,3) - Tokens:1
            SyntaxKind.Transition;[@];
        MetaCode span - Gen<None> - [addTagHelper] - SpanEditHandler;Accepts:None - (4:0,4) - Tokens:1
            SyntaxKind.Identifier;[addTagHelper];
        Markup span - Gen<None> - [ ] - SpanEditHandler;Accepts:None - (16:0,16) - Tokens:1
            SyntaxKind.Whitespace;[ ];
        Code span - Gen<AddTagHelper:{"*, Foo";*, Foo;*;Foo} [RZ2005(4:0,4 [12] )]> - ["*, Foo"LF] - SpanEditHandler;Accepts:AnyExceptNewline - (17:0,17) - Tokens:2
            SyntaxKind.StringLiteral;["*, Foo"];
            SyntaxKind.NewLine;[LF];
    Markup span - Gen<Markup> - [}] - SpanEditHandler;Accepts:Any - (27:1,0) - Tokens:1
        SyntaxKind.Text;[}];
