'If this index object represents an alias (which appear the same in the
Elasticsearch API), this method can be used to fetch the list of indices
the alias points to.
Use the is_alias method if you need to find out if this an alias. This
returns an empty list if called on an index.'

def aliased_indices(self):

    return [self.backend.index_class(self.backend, index_name) for index_name in self.es.indices.get_alias(name=self.name).keys()]
