code: @Override
      public boolean containsCacheId(Object cacheId) {
          boolean found = false;
          if (cacheId != null) {
              found = this.coreCache.containsCacheId(cacheId);
          }
          return found;
      }
docs: Returns true if memory cache contains a mapping for the specified cache
  ID.
  
  @param cacheId
  cache ID is to be tested.
  @return <code>true</code> if the memory cache contains the specified
  cacheID.