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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 rollback(self):
 """Call rollback on executed actions."""

        self._state_machine.transition_to_rollback()
        for action in reversed(self._executed_actions):
            try:
                self.execute_with_retries(action, lambda a: a.rollback())
            except:  # pylint: disable=bare-except
                pass  # on exception, carry on with rollback of other steps
        self._state_machine.transition_to_rollback_complete()