let.js.EXPECTED revision 1739:4a6a1fd3d3dd 
1[
2  {
3    "endPosition": "10",
4    "kind": "VARIABLE",
5    "binding": {
6      "endPosition": "6",
7      "kind": "IDENTIFIER",
8      "name": "x",
9      "startPosition": "5"
10    },
11    "let": "true",
12    "startPosition": "1",
13    "initializer": {
14      "endPosition": "10",
15      "kind": "NUMBER_LITERAL",
16      "value": "3",
17      "startPosition": "9"
18    }
19  }
20]
21