code: func (f *Field) AddRemoteAvailableShards(b *roaring.Bitmap) error {
  	f.mergeRemoteAvailableShards(b)
  	// Save the updated bitmap to the data store.
  	return f.saveAvailableShards()
  }
docs: // AddRemoteAvailableShards merges the set of available shards into the current known set
  // and saves the set to a file.