PetscErrorCode PetscShellGetComponent(PetscShell shell, const char key, PetscShell *component, PetscBool *found)Logically collective on comm.
|shell||- - PetscShell object being queried|
|key||- - a character string designating the key of the component being sought|
|component||- - the extracted component PetscShell object (or PETSC_NULL)|
|found||- - PetscBool flag indicating whether a component with the given key has been found (or PETSC_NULL)|
Notes: component can be PETSC_NULL, in which case only found is returned (if it is itself not PETSC_NULL). This is useful for quering for the presence of the given component, without extracting it.
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