code: def test_alternative_flow_functions():
      graphs = [nx.grid_2d_graph(4, 4), nx.cycle_graph(5)]
      for G in graphs:
          node_conn = nx.node_connectivity(G)
          for flow_func in flow_funcs:
              all_cuts = nx.all_node_cuts(G, flow_func=flow_func)
              # Only test a limited number of cut sets to reduce test time.
              for cut in itertools.islice(
                  all_cuts, MAX_CUTSETS_TO_TEST
              ):
                  assert node_conn == len(cut)
                  assert not nx.is_connected(
                      nx.restricted_view(G, cut, [])
                  )
  
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 14 for calling a global function with example usage: test_alternative_flow_functions() without return types