/// <summary>
/// Returns model metadata additional setting of type <typeparamref name="TSetting"/> associated with this <paramref name="item"/>.
/// New model setting will be created if no one is found.
/// </summary>
/// <param name="item"></param>
/// <typeparam name="TSetting"></typeparam>
/// <returns>Model validation metadata of type <typeparamref name="TSetting"/></returns>
public static TSetting GetAdditionalSettingOrCreateNew <TSetting>(this ModelMetadataItem item)
where TSetting : class, IModelMetadataAdditionalSetting, new()
{
TSetting setting = item.GetAdditionalSetting <TSetting>();
if (setting == null)
{
setting = new TSetting();
item.AdditionalSettings.Add(setting);
}
return(setting);
}
