docs: def ReadClientPostingLists(self, keywords):
      """Looks up all clients associated with any of the given keywords.
  
      Args:
        keywords: A list of keywords we are interested in.
  
      Returns:
        A dict mapping each keyword to a list of matching clients.
      """
  
      start_time, filtered_keywords = self._AnalyzeKeywords(keywords)
  
      return data_store.REL_DB.ListClientsForKeywords(
          filtered_keywords, start_time=start_time)