@property
    def rmin(self):
        if isinstance(self._rmin, OptThinRadius):
            return self._rmin.evaluate(self.star, self.dust)
        else:
            return self._rmin
Ensures data is prepped properly before handing off to
dataset/ETHPy150Open hyperion-rt/hyperion/hyperion/densities/power_law_envelope.py/PowerLawEnvelope.rmin--crossover with--dataset/ETHPy150Open WGBH/django-versatileimagefield/versatileimagefield/forms.py/VersatileImageFormField.to_python