code: def LoadElement(href, only_etag=False):
      
      request = SMCRequest(href=href)
      request.exception = FetchElementFailed
      result = request.read()
      if only_etag:
          return result.etag
      return ElementCache(
          result.json, etag=result.etag)
docs: Return an instance of a element as a ElementCache dict
      used as a cache.
      
      :rtype ElementCache