CSharpCodeBlock - [0..27)::27 - [@do { foo(); } while(true);]
    CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
        Transition;[@];
    CSharpStatementLiteral - [1..27)::26 - [do { foo(); } while(true);] - Gen<Stmt> - SpanEditHandler;Accepts:None
        Keyword;[do];
        Whitespace;[ ];
        LeftBrace;[{];
        Whitespace;[ ];
        Identifier;[foo];
        LeftParenthesis;[(];
        RightParenthesis;[)];
        Semicolon;[;];
        Whitespace;[ ];
        RightBrace;[}];
        Whitespace;[ ];
        Keyword;[while];
        LeftParenthesis;[(];
        Keyword;[true];
        RightParenthesis;[)];
        Semicolon;[;];
