function IsValidTimeZoneName(tz, _a) {
        var tzData = _a.tzData, uppercaseLinks = _a.uppercaseLinks;
        var uppercasedTz = tz.toUpperCase();
        var zoneNames = new Set(Object.keys(tzData).map(function (z) { return z.toUpperCase(); }));
        return zoneNames.has(uppercasedTz) || uppercasedTz in uppercaseLinks;
    }
https://tc39.es/ecma402/#sec-isvalidtimezonename
@param tz
@param implDetails implementation details