Similar to group_experiments,
        but uses the default manager to return archived experiments as well.

def all_group_experiments(self):
        """
        Similar to group_experiments,
        but uses the default manager to return archived experiments as well.
        """
        from db.models.experiments import Experiment

        if self.is_selection:
            return Experiment.all.filter(selections=self)
        return Experiment.all.filter(experiment_group=self)