RazorDocument - [0..28)::28 - [<span data-foo=@foo ></span>]
    MarkupBlock - [0..28)::28
        MarkupTagBlock - [0..21)::21 - [<span data-foo=@foo >]
            MarkupTextLiteral - [0..5)::5 - [<span] - Gen<Markup> - SpanEditHandler;Accepts:Any
                OpenAngle;[<];
                Text;[span];
            MarkupAttributeBlock - [5..19)::14 - [ data-foo=@foo]
                MarkupTextLiteral - [5..6)::1 - [ ] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    Whitespace;[ ];
                MarkupTextLiteral - [6..14)::8 - [data-foo] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    Text;[data-foo];
                Equals;[=];
                GenericBlock - [15..19)::4
                    CSharpCodeBlock - [15..19)::4
                        CSharpImplicitExpression - [15..19)::4
                            CSharpTransition - [15..16)::1 - Gen<None> - SpanEditHandler;Accepts:None
                                Transition;[@];
                            CSharpImplicitExpressionBody - [16..19)::3
                                CSharpCodeBlock - [16..19)::3
                                    CSharpExpressionLiteral - [16..19)::3 - [foo] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                                        Identifier;[foo];
            MarkupTextLiteral - [19..21)::2 - [ >] - Gen<Markup> - SpanEditHandler;Accepts:Any
                Whitespace;[ ];
                CloseAngle;[>];
        MarkupTagBlock - [21..28)::7 - [</span>]
            MarkupTextLiteral - [21..28)::7 - [</span>] - Gen<Markup> - SpanEditHandler;Accepts:Any
                OpenAngle;[<];
                ForwardSlash;[/];
                Text;[span];
                CloseAngle;[>];
