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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 start_instance(self):
 """Start the instance for this Streaming Analytics service. Returns: dict: JSON response for the instance start operation. """

        start_url = self._get_url('start_path')
        res = self.rest_client.session.put(start_url, json={})
        _handle_http_errors(res)
        return res.json()