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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 add_timeout_callback(self, callback, timeout_milliseconds, callback_id=None):
 """ Adds a callback to be run once after timeout_milliseconds. Returns an ID that can be used with remove_timeout_callback."""

        def wrapper(*args, **kwargs):
            self.remove_timeout_callback(callback_id)
            return callback(*args, **kwargs)

        handle = None

        def remover():
            if handle is not None:
                self._loop.remove_timeout(handle)

        callback_id = self._assign_remover(callback, callback_id, self._timeout_callback_removers, remover)
        handle = self._loop.call_later(timeout_milliseconds / 1000.0, wrapper)
        return callback_id