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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 close(self, close_socket=False):
 """Close the open socket for this manager :return: """

        self._bm.stop_socket(self._conn_key)
        if close_socket:
            self._bm.close()
        time.sleep(1)
        self._depth_cache = None