code: def all_stars(self):
          
  
          stars = []
          for item in self._data:
              if isinstance(item, LinkedEPSFStar):
                  stars.extend(item.all_stars)
              else:
                  stars.append(item)
  
          return stars
docs: A list of all `EPSFStar` objects stored in this object,
          including those that comprise linked stars (i.e.
          `LinkedEPSFStar`), as a flat list.