/// <summary>Filters an item by access which returning null if the item is not accessible to the current user.</summary>
/// <typeparam name="T">Generic argument to allow strongly typed returns.</typeparam>
/// <param name="item">The item to filter.</param>
/// <param name="user">The user to filter access for.</param>
/// <returns>The item if it's accessible to the current user.</returns>
public static T FilterByAccess <T>(this T item, IPrincipal user) where T : ContentItem
{
return(item.FilterWith(new AccessFilter(user, AccessFilter.CurrentSecurityManager())));
}
