Directive block - Gen<None> - 18 - (0:0,0)
    Code span - Gen<Import: Foo.Bar.Baz;> - [using Foo.Bar.Baz;] - SpanEditHandler;Accepts:AnyExceptNewline - (0:0,0) - Tokens:8
        CSharpTokenType.Keyword;[using];
        CSharpTokenType.WhiteSpace;[ ];
        CSharpTokenType.Identifier;[Foo];
        CSharpTokenType.Dot;[.];
        CSharpTokenType.Identifier;[Bar];
        CSharpTokenType.Dot;[.];
        CSharpTokenType.Identifier;[Baz];
        CSharpTokenType.Semicolon;[;];
