private void assignCacheLoader(CacheLoader cl) {
    readWriteLockForCacheLoader.writeLock().lock();
    try {
      cacheLoader = cl;
    } finally {
      readWriteLockForCacheLoader.writeLock().unlock();
    }
  }
Initialize any wrapped RegionMembershipListeners in the cache listener list
geode-core/src/main/java/org/apache/geode/internal/cache/AbstractRegion.java