code: def execute(self):
          
          self._state_machine.transition_to_execute()
          for action in self._actions:
              self._executed_actions.append(action)
              self.execute_with_retries(action, lambda a: a.execute())
          self._state_machine.transition_to_execute_complete()
docs: Execute all actions, throwing an ExecutionException on failure.
  
          Catch the ExecutionException and call rollback() to rollback.