code: def has_stable_releases(self):
          
          nonzeroes = self.stable_families
          # Nothing but 0.x releases -> yup we're prehistory
          if not nonzeroes:
              return False
          # Presumably, if there's >1 major family besides 0.x, we're at least
          # one release into the 1.0 (or w/e) line.
          if len(nonzeroes) > 1:
              return True
          # If there's only one, we may still be in the space before its N.0.0 as
          # well; we can check by testing for existence of bugfix buckets
          return any(
              x for x in self[nonzeroes[0]] if not x.startswith('unreleased')
          )
docs: Returns whether stable (post-0.x) releases seem to exist.