RazorDocument - [0..11)::11 - [foo @Us baz]
    MarkupBlock - [0..11)::11
        MarkupTextLiteral - [0..4)::4 - [foo ] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Text;[foo];
            Whitespace;[ ];
        CSharpCodeBlock - [4..7)::3
            CSharpImplicitExpression - [4..7)::3
                CSharpTransition - [4..5)::1 - Gen<None> - SpanEditHandler;Accepts:None
                    Transition;[@];
                CSharpImplicitExpressionBody - [5..7)::2
                    CSharpCodeBlock - [5..7)::2
                        CSharpExpressionLiteral - [5..7)::2 - [Us] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K22
                            Identifier;[Us];
        MarkupTextLiteral - [7..11)::4 - [ baz] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Whitespace;[ ];
            Text;[baz];
