private static void GetIndexes(ModelBindingContext bindingContext, out bool stopOnIndexNotFound, out IEnumerable<string> indexes)
        {
            string indexKey = CreateSubPropertyName(bindingContext.ModelName, "index");
            ValueProviderResult valueProviderResult = bindingContext.ValueProvider.GetValue(indexKey);

            if (valueProviderResult != null)
            {
                string[] indexesArray = valueProviderResult.ConvertTo(typeof(string[])) as string[];
                if (indexesArray != null)
                {
                    stopOnIndexNotFound = false;
                    indexes = indexesArray;
                    return;
                }
            }

            // just use a simple zero-based system
            stopOnIndexNotFound = true;
            indexes = GetZeroBasedIndexes();
        }