static IsDateValueFunctionOperator()
        {
            IsDateValueFunctionOperator instance = new IsDateValueFunctionOperator();

            if (CriteriaOperator.GetCustomFunction(instance.Name) == null)
            {
                CriteriaOperator.RegisterCustomFunction(instance);
            }
        }
 public static void Register()
 {
     //IshowInternalIDFunctionOperator.Register();
     IsBoolValueFunctionOperator.Register();
     IsStringValueFunctionOperator.Register();
     IsNumberValueFunctionOperator.Register();
     IsDateValueFunctionOperator.Register();
     //ISEnumValueFunctionOperator.Register();
 }