Expression block - Gen<Expr> - 15 - (0:0,0)
    Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:1
        CSharpSymbolType.Transition;[@];
    Code span - Gen<Expr> - [Html.En(code()] - ImplicitExpressionEditHandler;Accepts:Any;ImplicitExpression[RTD];K14 - (1:0,1) - Symbols:7
        CSharpSymbolType.Identifier;[Html];
        CSharpSymbolType.Dot;[.];
        CSharpSymbolType.Identifier;[En];
        CSharpSymbolType.LeftParenthesis;[(];
        CSharpSymbolType.Identifier;[code];
        CSharpSymbolType.LeftParenthesis;[(];
        CSharpSymbolType.RightParenthesis;[)];
