{"ScriptPreparationCode":"let obj = {\r\n a: 1,\r\n b: [],\r\n c: \u0027abc\u0027,\r\n d: Symbol(\u0027test\u0027)\r\n },\r\n keys = Object.keys(obj).keys()","TestCases":[{"Name":"for...in","Code":"for (let prop in obj) console.log(prop)","IsDeferred":false},{"Name":"Object.keys.keys","Code":"for (let prop of keys) console.log(prop)","IsDeferred":false}]}