Plot GO IDs.

def get_gosubdagplot(self, goids=None, **kws_usr):
        """Plot GO IDs."""
        if goids is None:
            goids = self.grprobj.usrgos
        kws_plt, kws_dag = self._get_kws_plt(goids, **kws_usr)
        gosubdag = GoSubDag(
            goids,
            self.grprobj.gosubdag.get_go2obj(goids),
            self.grprobj.gosubdag.relationships,
            rcntobj=self.grprobj.gosubdag.rcntobj,
            go2nt=self.grprobj.gosubdag.go2nt,
            **kws_dag)
        return GoSubDagPlot(gosubdag, **kws_plt)