CSharpCodeBlock - [0..20)::20 - [@if(true) { foo(); }]
    CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
        Transition;[@];
    CSharpStatementLiteral - [1..20)::19 - [if(true) { foo(); }] - Gen<Stmt> - SpanEditHandler;Accepts:Any
        Keyword;[if];
        LeftParenthesis;[(];
        Keyword;[true];
        RightParenthesis;[)];
        Whitespace;[ ];
        LeftBrace;[{];
        Whitespace;[ ];
        Identifier;[foo];
        LeftParenthesis;[(];
        RightParenthesis;[)];
        Semicolon;[;];
        Whitespace;[ ];
        RightBrace;[}];
