public static IResourceGroup GetOrAddGroup(this IResourceCache resourceCache, string consolidatedUrl, Func <IResourceGroup> getGroup)
{
IResourceGroup group;
if (resourceCache.TryGetGroup(consolidatedUrl, out group))
{
return(group);
}
group = getGroup();
if (group != null)
{
resourceCache.StoreGroup(consolidatedUrl, group);
}
return(group);
}