function shareEnum(enu:any):string[] {
    return Object.keys(enu)
        .filter((key:string) => {
            let value = parseInt(key);
            return typeof value === "number" && isFinite(value) && Math.floor(value) === value;
        })
        .reduce((result:string[], key:string) => {
            result[key] = enu[key];
            return result;
        }, []);
}