Since here, we are in process mode: you only have to use metas (objects_ids, states)
        :param pipe_package:
        :return:

def _process_compute(self, pipe_package):
        """
        Since here, we are in process mode: you only have to use metas (objects_ids, states)
        :param pipe_package:
        :return:
        """
        context = pipe_package.get_context()
        step_key = pipe_package.get_step_key()
        actions = []
        for mechanism in self._event_manager.get_mechanisms_steps()[step_key]:
            mechanism_actions = mechanism.run(context)
            for mechanism_action in mechanism_actions:
                actions.append(mechanism_action)
        return actions