code: def plot_gos(fout_img, goids, go2obj, **kws):
      
      gosubdag = GoSubDag(goids, go2obj, rcntobj=True)
      godagplot = GoSubDagPlot(gosubdag, **kws)
      godagplot.plt_dag(fout_img)
docs: Given GO ids and the obo_dag, create a plot of paths from GO ids.