def add_envs(self, *envs):
        # @@@ optimize this to reduce queries once we have bulk insert in 1.4
        self.environments.add(*envs)
        for model, instances in self.cascade_envs_to(
                [self], adding=True).items():
            for instance in instances:
                instance.add_envs(*envs)
A round trip test of creating a FitsHDU, adding a FITS file to it,
dataset/ETHPy150Open mozilla/moztrap/moztrap/model/environments/models.py/HasEnvironmentsModel.add_envs--crossover with--dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/tests/test_nonstandard.py/TestNonstandardHdus.test_create_fitshdu