Statement block - Gen<None> - 18 - (0:0,0)
    Code span - Gen<Stmt> - [if (true) { ] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:8
        SyntaxKind.Keyword;[if];
        SyntaxKind.Whitespace;[ ];
        SyntaxKind.LeftParenthesis;[(];
        SyntaxKind.Keyword;[true];
        SyntaxKind.RightParenthesis;[)];
        SyntaxKind.Whitespace;[ ];
        SyntaxKind.LeftBrace;[{];
        SyntaxKind.Whitespace;[ ];
    Expression block - Gen<Expr> - 4 - (12:0,12)
        Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (12:0,12) - Tokens:1
            SyntaxKind.Transition;[@];
        Code span - Gen<Expr> - [foo] - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[ATD];K14 - (13:0,13) - Tokens:1
            SyntaxKind.Identifier;[foo];
    Code span - Gen<Stmt> - [ }] - SpanEditHandler;Accepts:Any - (16:0,16) - Tokens:2
        SyntaxKind.Whitespace;[ ];
        SyntaxKind.RightBrace;[}];
