/*D
   MPI_Comm_group - Accesses the group associated with given communicator

Synopsis:
.vb
int MPI_Comm_group(MPI_Comm comm, MPI_Group *group)
.ve

Input Parameters:
. comm - communicator (handle)

Output Parameters:
. group - group corresponding to comm (handle)

.N COMMNULL

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_COMM
.N MPI_ERR_OTHER

D*/

