code: def test_torrents_and_ferraro_graph():
      G = torrents_and_ferraro_graph()
      _check_separating_sets(G)
  
imports: import itertools
  import pytest
  import networkx
  from networkx.algorithms import flow
  from networkx.algorithms.connectivity.kcutsets import _is_separating_set
label_desc: Use image node_id 4 for calling a global function with example usage: test_torrents_and_ferraro_graph() without return types