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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:
 async def stop(self, wait_for_completion=True):
 """Stop window. Parameters: * wait_for_completion: If set, function will return after device has reached target position. """

        await self.set_position(
            position=CurrentPosition(),
            wait_for_completion=wait_for_completion)