Directive block - Gen<None> - 13 - (0:0,0)
    Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (0:0,0) - Tokens:1
        CSharpTokenType.Transition;[@];
    Code span - Gen<Import: static;> - [using static] - SpanEditHandler;Accepts:AnyExceptNewline - (1:0,1) - Tokens:3
        CSharpTokenType.Keyword;[using];
        CSharpTokenType.WhiteSpace;[ ];
        CSharpTokenType.Keyword;[static];
