docs: def CollectionReadIndex(self, collection_id):
      """Reads all index entries for the given collection.
  
      Args:
        collection_id: ID of the collection for which the indexes should be
          retrieved.
  
      Yields:
        Tuples (index, ts, suffix).
      """
      for (attr, value,
           ts) in self.ResolvePrefix(collection_id,
                                     self.COLLECTION_INDEX_ATTRIBUTE_PREFIX):
        i = int(attr[len(self.COLLECTION_INDEX_ATTRIBUTE_PREFIX):], 16)
        yield (i, ts, int(value, 16))