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# DMShellGetCreateRestriction
Get the routine used to create the restriction operator 
## Synopsis
```
#include "petscdmshell.h"  
PetscErrorCode DMShellGetCreateRestriction(DM dm, PetscErrorCode (**restriction)(DM, DM, Mat *))
```
Logically Collective


## Input Parameter

- ***dm -*** the `DMSHELL`



## Output Parameter

- ***restriction -*** the routine to create the restriction





## See Also
 `DM`, `DMSHELL`, `DMShellSetCreateInjection()`, `DMCreateInterpolation()`, `DMShellSetContext()`, `DMShellGetContext()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/shell/dmshell.c.html#DMShellGetCreateRestriction">src/dm/impls/shell/dmshell.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/shell/dmshell.c)


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