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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 stop_serving(self):
 """Stop the serving container. The serving container runs in async mode to allow the SDK to do other tasks. """

        if self.container:
            self.container.down()
            self.container.join()
            self._cleanup()
        # for serving we can delete everything in the container root.
        _delete_tree(self.container_root)