code: def _getobjs_higher(self, goobj):
          
          goobjs_higher = set(goobj.parents)
          for reltyp, relgoobjs in goobj.relationship.items():
              if reltyp in self.relationships:
                  goobjs_higher.update(relgoobjs)
          return goobjs_higher
docs: Get all parents/relationships on this GOTerm.