code: def test_is_separating_set():
      for i in [5, 10, 15]:
          G = nx.star_graph(i)
          max_degree_node = max(G, key=G.degree)
          assert _is_separating_set(G, {max_degree_node})
  
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 16 for calling a global function with example usage: test_is_separating_set() without return types