public void Validate()
        {
            View.ValidateRequired("View");

            ItemIDs.ValidateOptional("ItemIDs");
            Keys.ValidateOptional("Keys");
            Filters.ValidateOptional <ItemFilter>("Filter");
            ClientIDs.ValidateOptional("ClientIDs");
            MaxResults.ValidateOptional("MaxResults");
            MaxFullItems.ValidateOptional("MaxFullItems");
        }