code: def all_species_release_pairs(cls):
          
          for species_name in cls.all_registered_latin_names():
              species = cls._latin_names_to_species[species_name]
              for _, release_range in species.reference_assemblies.items():
                  for release in range(release_range[0], release_range[1] + 1):
                      yield species_name, release
docs: Generator which yields (species, release) pairs
          for all possible combinations.