code: def _add_goterms(self, go2obj_user, goid):
          
          goterm = self.go2obj_orig[goid]
          if goid != goterm.id and goterm.id in go2obj_user and goid not in go2obj_user:
              go2obj_user[goid] = goterm
docs: Add alt GO IDs to go2obj subset, if requested and relevant.