code: def test_is_dominating_set():
      G = nx.path_graph(4)
      d = {1, 3}
      assert nx.is_dominating_set(G, d)
      d = {0, 2}
      assert nx.is_dominating_set(G, d)
      d = {1}
      assert not nx.is_dominating_set(G, d)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 4 for calling a global function with example usage: test_is_dominating_set() without return types