code: public Object createObjectCache(String reference) {
          final String methodName = "createCacheInstance()";
  
          if (tc.isEntryEnabled())
              Tr.entry(tc, methodName + " cacheName=" + reference);
  
          CacheConfig config = ServerCache.getCacheService().getCacheInstanceConfig(reference);
  
          if (config == null) {
              // DYNA1004E=DYNA1004E: WebSphere Dynamic Cache instance named {0} can not be initialized because it is not
              // configured.
              // DYNA1004E.explanation=This message indicates the named WebSphere Dynamic Cache instance can not be
              // initialized. The named instance is not avaliable.
              // DYNA1004E.useraction=Use the WebSphere Administrative Console to configure a cache instance resource
              // named {0}.
              Tr.error(tc, "DYNA1004E", new Object[] { reference });
          }
  
          /*
           * Sync on the WCCMConfig because multiple cache readers might have entered the createCacheInstance at the same
           * time. With this sync one reader has to wait till the other has finished creating the cache instance
           */
          DistributedObjectCache dCache = null;
          synchronized (config) { // ADDED FOR 378973
              if (tc.isDebugEnabled()) {
                  Tr.debug(tc, "Entered synchronized (config) for " + config.getCacheName());
              }
  
              dCache = config.getDistributedObjectCache();
              if (dCache == null) {
                  dCache = createDistributedObjectCache(config);
                  config.setDistributedObjectCache(dCache);
              }
          }
          if (tc.isDebugEnabled()) {
              Tr.debug(tc, methodName + " cacheName in=" + reference + " out=" + reference);
          }
  
          if (tc.isEntryEnabled())
              Tr.exit(tc, methodName + "  distributedObjectCache=" + dCache);
          return dCache;
      }
docs: Create a DistributedObjectCache from a string reference. The config for the reference must already exist.
  
  @param reference
  @return The returned object can be type cast to DistributedObjectCache and will be a DistributedMap,
  DistributedLockingMap or DistributedNioMap.