See an implementation [here] (https://github.com/gidden/cycamore/blob/cep18/src/Models/EnrichmentFacility/enrichment_facility.h#L46) with its corresponding [test](https://github.com/gidden/cycamore/blob/cep18/src/Models/EnrichmentFacility/enrichment_facility_tests.cc#L391).

This equality is provided for testing. I'd enjoy thoughts on how to achieve the same result in another way.