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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 reset_rammbock(self):
 """Closes all connections, deletes all servers, clients, and protocols. You should call this method before exiting your test run. This will close all the connections and the ports will therefore be available for reuse faster. """

        for client in self._clients:
            client.close()
        for server in self._servers:
            server.close()
        self._init_caches()