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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def exists_alias(self, using=None, **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. """

        return self._get_connection(using).indices.exists_alias(index=self._name, **kwargs)