CSharpCodeBlock - [0..9)::9 - [using Foo]
    RazorDirective - [0..9)::9
        CSharpTransition - [0..0)::0 - Gen<None> - SpanEditHandler;Accepts:None
            Transition;[<Missing>];
        RazorDirectiveBody - [0..9)::9
            CSharpStatementLiteral - [0..9)::9 - [using Foo] - Gen<Import: Foo;> - SpanEditHandler;Accepts:AnyExceptNewline
                Keyword;[using];
                Whitespace;[ ];
                Identifier;[Foo];
