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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 ttl(self):
 """LeaseTimeToLive retrieves lease information. This method makes a synchronous HTTP request by default. To make an asynchronous HTTP request, please define a `callback` function to be invoked when receiving the response. :return: """

        result = self.client.post(self.client.get_url("/kv/lease/timetolive"),
                                  json={"ID": self.id})
        return int(result['TTL'])