code: public boolean isCacheContainer(String cacheContainerName) throws Exception {
          Address addr = Address.root().add(SUBSYSTEM, SUBSYSTEM_INFINISPAN);
          String haystack = CACHE_CONTAINER;
          return null != findNodeInList(addr, haystack, cacheContainerName);
      }
docs: Checks to see if there is already a cache container with the given name.
  
  @param cacheContainerName the name to check
  @return true if there is a cache container with the given name already in existence
  @throws Exception any error