/**
  * @since 2.2
  *
  * @return ConceptCache
  */
 public function newMasterConceptCache()
 {
     $conceptQueryResolver = new ConceptQueryResolver($this->newMasterQueryEngine());
     $conceptQueryResolver->setConceptFeatures($GLOBALS['smwgQConceptFeatures']);
     $conceptCache = new ConceptCache($this->store, $conceptQueryResolver);
     $conceptCache->setUpperLimit($GLOBALS['smwgQMaxLimit']);
     return $conceptCache;
 }