public Interp4DVec CopyMe()
        {
            var result = new Interp4DVec();

            result.CopyParamsFrom(this);
            foreach (var item in _data)
            {
                result.AddElement(item.Key, item.Value.CopyMe());
            }
            return(result);
        }
 public static Interp4DVec LoadFromXmlString(string fileStr) => Interp4DVec.LoadFromXmlString <Interp4DVec>(fileStr);
 public static Interp4DVec LoadFromXmlFile(string fileName) => Interp4DVec.LoadFromXmlFile <Interp4DVec>(fileName);