19   PetscBool           useports, flg;  in main()  local
37   PetscCall(PetscOptionsHasName(NULL, NULL, "-nolegend", &flg));  in main()
38   if (flg) legend = NULL;  in main()
39   PetscCall(PetscOptionsHasName(NULL, NULL, "-notoplabel", &flg));  in main()
40   if (flg) toplabel = NULL;  in main()
41   PetscCall(PetscOptionsHasName(NULL, NULL, "-noxlabel", &flg));  in main()
42   if (flg) xlabel = NULL;  in main()
43   PetscCall(PetscOptionsHasName(NULL, NULL, "-noylabel", &flg));  in main()
44   if (flg) ylabel = NULL;  in main()
45   PetscCall(PetscOptionsHasName(NULL, NULL, "-nolabels", &flg));  in main()
46   if (flg) {  in main()