code: def test_small_graph():
      G = nx.Graph()
      G.add_edge(1, 2)
      G.add_edge(1, 3)
      G.add_edge(2, 3)
      assert nx.is_kl_connected(G, 2, 2)
      H = nx.kl_connected_subgraph(G, 2, 2)
      (H, graphOK) = nx.kl_connected_subgraph(
          G, 2, 2, low_memory=True, same_as_graph=True
      )
      assert graphOK
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_small_graph() without return types