code: def add_alt_goids(go2values, altgo2goobj):
      
      for goobj_key in altgo2goobj.values():
          values_curr = go2values[goobj_key.id]
          for goid_alt in goobj_key.alt_ids:
              go2values[goid_alt] = values_curr
      return go2values
docs: Add alternate source GO IDs.