10   DM           base, forest, plex;  in main()  local
25   PetscCall(DMCreate(PETSC_COMM_WORLD, &forest));  in main()
26   PetscCall(DMSetType(forest, DMP4EST));  in main()
27   PetscCall(DMForestSetBaseDM(forest, base));  in main()
28   PetscCall(DMForestSetInitialRefinement(forest, min_refine));  in main()
29   PetscCall(DMForestSetPartitionOverlap(forest, overlap));  in main()
30   PetscCall(DMSetUp(forest));  in main()
32   PetscCall(DMViewFromOptions(forest, NULL, "-dm_view"));  in main()
34   PetscCall(DMConvert(forest, DMPLEX, &plex));  in main()
37   PetscCall(PetscSectionCreate(PetscObjectComm((PetscObject)forest), &s));  in main()
41   PetscCall(DMSetLocalSection(forest, s));  in main()
44   PetscCall(DMCreateGlobalVector(forest, &g));  in main()
51   PetscCall(DMCreateGlobalVector(forest, &g2));  in main()
64   PetscCall(DMDestroy(&forest));  in main()