public function GetResourcesInGroup($publicResourceGroupId)
 {
     if (!array_key_exists($publicResourceGroupId, $this->cache)) {
         $group = $this->resourceRepository->LoadResourceGroupByPublicId($publicResourceGroupId);
         if ($group == null) {
             return array();
         }
         $groups = $this->resourceRepository->GetResourceGroups();
         $this->cache[$publicResourceGroupId] = $groups->GetResourceIds($group->id);
     }
     return $this->cache[$publicResourceGroupId];
 }