public void unsetProductPreference(
     String modeName,
     String descriptorName,
     String preferredProductName,
     String otherProductName) {
   Lock writeLock = lock.writeLock();
   try {
     writeLock.lock();
     super.unsetProductPreference(
         modeName, descriptorName, preferredProductName, otherProductName);
   } finally {
     writeLock.unlock();
   }
 }