async def exists_alias(
        self, using: Optional[AsyncUsingType] = None, **kwargs: Any
    ) -> bool:
        """
        Return a boolean indicating whether given alias exists for this index.

        Any additional keyword arguments will be passed to
        ``Elasticsearch.indices.exists_alias`` unchanged.
        """
        return bool(
            await self._get_connection(using).indices.exists_alias(
                index=self._name, **kwargs
            )
        )

        Return a boolean indicating whether given alias exists for this index.

        Any additional keyword arguments will be passed to
        ``Elasticsearch.indices.exists_alias`` unchanged.
        
elasticsearch/dsl/_async/index.py