PETSc version 3.15.5

DMPlexStratifyMigrationSF

Rearrange the leaves of a migration sf for stratification.

#include "petscdmplex.h"   
#include "petscdmlabel.h"  
PetscErrorCode DMPlexStratifyMigrationSF(DM dm, PetscSF sf, PetscSF *migrationSF)

	dm	- The DM
	sf	- A star forest with non-ordered leaves, usually defining a DM point migration

migrationSF

- A star forest with added leaf indirection that ensures the resulting DM is stratified

This lexicographically sorts by (depth, cellType)

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