code: def _get_dotgraphs(self, hdrgo, usrgos, pltargs, go2parentids):
          
          gosubdagplotnts = self._get_gosubdagplotnts(hdrgo, usrgos, pltargs, go2parentids)
          # Create DAG graphs as dot language strings. Loop through GoSubDagPlotNt list
          dotstrs = [obj.get_dotstr() for obj in gosubdagplotnts]
          return dotstrs
docs: Get a GO DAG in a dot-language string for a single Group of user GOs.