{"ScriptPreparationCode":"const err = Error()\r\n\r\nfunction isInstanceOf(x) {\r\n\treturn x instanceof InstOf\r\n}\r\n\r\n\r\nconst symb = Symbol()\r\n\r\nlet errWithSymb = Error()\r\nerrWithSymb[symb] = 1\r\n\r\nfunction hasSymb(x) {\r\n\treturn typeof x === \u0022object\u0022 \u0026\u0026 symb in x\r\n}","TestCases":[{"Name":"instanceof","Code":"isInstanceOf(err)","IsDeferred":false},{"Name":"has symbol","Code":"hasSymb(errWithSymb)","IsDeferred":false}]}