Scalable RMAT Generator Example Code Not Working

Hi,
I am trying to follow the instructions here https://live.boost.org/doc/libs/1_86_0/libs/graph_parallel/doc/html/scalable_rmat_generator.html

but the issue is that example code does not work :
```
#include
#include
#include
#include

using boost::graph::distributed::mpi_process_group;

typedef compressed_sparse_row_graph > Graph;
typedef boost::scalable_rmat_iterator RMATGen;

int main()
{
boost::minstd_rand gen;
mpi_process_group pg;

int N = 100;

boost::parallel::variant_distribution distrib
= boost::parallel::block(pg, N);

// Create graph with 100 nodes and 400 edges
Graph g(RMATGen(pg, distrib, gen, N, 400, 0.57, 0.19, 0.19, 0.05),
RMATGen(), N, pg, distrib);
return 0;
}
```

First it complained that `#include ` was missing and then bunch of variables needed namespace like `boost::directedS` but then `ProcessGroup` complained that it does not exist and this function template requires 4 arguments but received 2 error `typedef boost::scalable_rmat_iterator`

I would like to get help to make this code including all missing parts to get it working.
Thank you in advance

Start with the scalable RMAT generator example in scalable_rmat_generator.html and compile the pasted code with Boost Graph Parallel and MPI enabled. Compare each reported missing declaration and template argument with the current APIs; done means the documented example compiles and runs as described.

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