/**
  * @param UncacherBaseDaoWorker $uncacher
  * @return UncacherBaseDaoWorker
  */
 private function mergeSelf(UncacherSmartDaoWorkerLists $uncacher)
 {
     foreach ($uncacher->getClassNameMap() as $className => $classNameRow) {
         if (!isset($this->classNameMap[$className])) {
             $this->classNameMap[$className] = $classNameRow;
         }
     }
     return $this;
 }