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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 finalize_backward_execution(self):
 """ Utility function to finalize the backward execution of the concurrency state. :return: """

        # backward_execution needs to be True to signal the parent container state the backward execution
        self.backward_execution = True
        # pop the ConcurrencyItem as we are leaving the barrier concurrency state
        last_history_item = self.execution_history.pop_last_item()
        assert isinstance(last_history_item, ConcurrencyItem)

        last_history_item = self.execution_history.pop_last_item()
        assert isinstance(last_history_item, CallItem)
        # this copy is convenience and not required here
        self.scoped_data = last_history_item.scoped_data
        self.state_execution_status = StateExecutionStatus.WAIT_FOR_NEXT_STATE
        return self.finalize()