RazorDocument - [0..18)::18 - [@addTagHelper "Foo]
    MarkupBlock - [0..18)::18
        MarkupTextLiteral - [0..0)::0 - [] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Marker;[];
        CSharpCodeBlock - [0..18)::18
            RazorDirective - [0..18)::18
                CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
                    Transition;[@];
                RazorDirectiveBody - [1..18)::17
                    RazorMetaCode - [1..13)::12 - Gen<None> - SpanEditHandler;Accepts:None
                        Identifier;[addTagHelper];
                    CSharpCodeBlock - [13..18)::5
                        MarkupTextLiteral - [13..14)::1 - [ ] - Gen<None> - SpanEditHandler;Accepts:None
                            Whitespace;[ ];
                        CSharpStatementLiteral - [14..18)::4 - ["Foo] - Gen<AddTagHelper:{"Foo;"Foo;;} [RZ1000(14:0,14 [1] ), RZ1019(14:0,14 [4] ), RZ1036(14:0,14 [4] )]> - SpanEditHandler;Accepts:AnyExceptNewline
                            StringLiteral;["Foo];RZ1000(14:0,14 [1] )
        MarkupTextLiteral - [18..18)::0 - [] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Marker;[];
    EndOfFile;[];
