/// <summary>
        /// Prepare predefined product attribute value search model
        /// </summary>
        /// <param name="searchModel">Predefined product attribute value search model</param>
        /// <param name="productAttribute">Product attribute</param>
        /// <returns>Predefined product attribute value search model</returns>
        protected virtual PredefinedProductAttributeValueSearchModel PreparePredefinedProductAttributeValueSearchModel(
            PredefinedProductAttributeValueSearchModel searchModel, ProductAttribute productAttribute)
        {
            if (searchModel == null)
            {
                throw new ArgumentNullException(nameof(searchModel));
            }

            if (productAttribute == null)
            {
                throw new ArgumentNullException(nameof(productAttribute));
            }

            searchModel.ProductAttributeId = productAttribute.Id;

            //prepare page parameters
            searchModel.SetGridPageSize();

            return(searchModel);
        }