long mpiSequenceConfigGet(MPISequence sequence,
                          MPISequenceConfig *config,
                          void *external) 

SequenceConfigGet gets the configuration of a Sequence object (sequence) and writes it in the structure pointed to by config, and also writes it into the implementation-specific structure pointed to by external (if external is not NULL).

The Sequence's configuration information in external is in addition to the Sequence's configuration information in config, i.e, the configuration information in config and in external is not the same information. Note that config or external can be NULL (but not both NULL).

external either points to a structure of type MEISequenceConfig{} or is NULL.