/**
         * <summary>
         *   Enumère toutes les fonctions de type Function.
         * <para>
         *   Returns an array of strings representing hardware identifiers for all Function functions presently connected.
         * </para>
         * </summary>
         */
        public static string[] GetSimilarFunctions()
        {
            List <string> res = new List <string>();
            YFunction     it  = YFunction.FirstFunction();

            while (it != null)
            {
                res.Add(it.get_hardwareId());
                it = it.nextFunction();
            }
            return(res.ToArray());
        }
        public static YFunctionProxy FindFunction(string name)
        {
            // cases to handle:
            // name =""  no matching unknwn
            // name =""  unknown exists
            // name != "" no  matching unknown
            // name !="" unknown exists
            YFunction      func = null;
            YFunctionProxy res  = (YFunctionProxy)YFunctionProxy.FindSimilarUnknownFunction("YFunctionProxy");

            if (name == "")
            {
                if (res != null)
                {
                    return(res);
                }
                res = (YFunctionProxy)YFunctionProxy.FindSimilarKnownFunction("YFunctionProxy");
                if (res != null)
                {
                    return(res);
                }
                func = YFunction.FirstFunction();
                if (func != null)
                {
                    name = func.get_hardwareId();
                    if (func.get_userData() != null)
                    {
                        return((YFunctionProxy)func.get_userData());
                    }
                }
            }
            else
            {
                func = YFunction.FindFunction(name);
                if (func.get_userData() != null)
                {
                    return((YFunctionProxy)func.get_userData());
                }
            }
            if (res == null)
            {
                res = new YFunctionProxy(func, name);
            }
            if (func != null)
            {
                res.linkToHardware(name);
                if (func.isOnline())
                {
                    res.arrival();
                }
            }
            return(res);
        }