@phoboslab Thanks for answering!! And how can I enumerate a JSExport object? See `putNonEnumerable` https://github.com/phoboslab/JavaScriptCore-iOS/blob/544b3a2f17758b081f33ac44829479ff5a82ae79/JavaScriptCore/API/JSWrapperMap.mm#L465 https://github.com/phoboslab/JavaScriptCore-iOS/blob/544b3a2f17758b081f33ac44829479ff5a82ae79/JavaScriptCore/API/JSWrapperMap.mm#L150