code: def _get_go2nt(goids, go2nt_all):
      
      go_nt_list = []
      goids_seen = set()
      for goid_usr in goids:
          ntgo = go2nt_all[goid_usr]
          goid_main = ntgo.id
          if goid_main not in goids_seen:
              goids_seen.add(goid_main)
              go_nt_list.append((goid_main, ntgo))
      return go_nt_list
docs: Get user go2nt using main GO IDs, not alt IDs.