def list_same_dimensions(self, unit_object):
        """
        Return a list of base unit names that this registry knows about that
        are of equivalent dimensions to *unit_object*.
        """
        equiv = [k for k, v in self.lut.items() if v[1] is unit_object.dimensions]
        equiv = list(sorted(set(equiv)))
        return equiv
Return a list of base unit names that this registry knows about that
        are of equivalent dimensions to *unit_object*.