Expression block - Gen<Expr> - 14 - (0:0,0)
    Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:1
        CSharpSymbolType.Transition;[@];
    Code span - Gen<Expr> - [foo().bar.baz] - ImplicitExpressionEditHandler;Accepts:NonWhiteSpace;ImplicitExpression[RTD];K14 - (1:0,1) - Symbols:7
        CSharpSymbolType.Identifier;[foo];
        CSharpSymbolType.LeftParenthesis;[(];
        CSharpSymbolType.RightParenthesis;[)];
        CSharpSymbolType.Dot;[.];
        CSharpSymbolType.Identifier;[bar];
        CSharpSymbolType.Dot;[.];
        CSharpSymbolType.Identifier;[baz];
