code: def get_cached_data(datatable, **kwargs):
      
      cache_key = '%s%s' % (CACHE_PREFIX, datatable.get_cache_key(**kwargs))
      data = cache.get(cache_key)
      log.debug("Reading data from cache at %r: %r", cache_key, data)
      return data
docs: Returns the cached object list under the appropriate key, or None if not set.