@Override
  public Map<String, Object> getBulk(Collection<String> keys) {
    return getBulk(keys, transcoder);
  }
Get the values for multiple keys from the cache.

@param keys the keys
@return a map of the values (for each value that exists)
@throws OperationTimeoutException if the global operation timeout is
          exceeded
@throws IllegalStateException in the rare circumstance where queue is too
          full to accept any more requests
src/main/java/net/spy/memcached/MemcachedClient.java