code: def test_incremental(self):
      # Check that incremental and regular give same output
      G = self.undirected_G.copy()
      prev_cc = None
      for i in range(5):
          if i % 2 == 0:
              # Remove an edge
              insert = False
              edge = self.pick_remove_edge(G)
          else:
              # Add an edge
              insert = True
              edge = self.pick_add_edge(G)
  
          # start = timeit.default_timer()
          test_cc = nx.incremental_closeness_centrality(
              G, edge, prev_cc, insert
          )
          # inc_elapsed = (timeit.default_timer() - start)
          # print(f"incremental time: {inc_elapsed}")
  
          if insert:
              G.add_edges_from([edge])
          else:
              G.remove_edges_from([edge])
  
          # start = timeit.default_timer()
          real_cc = nx.closeness_centrality(G)
          # reg_elapsed = (timeit.default_timer() - start)
          # print(f"regular time: {reg_elapsed}")
          # Example output:
          # incremental time: 0.208
          # regular time: 0.276
          # incremental time: 0.00683
          # regular time: 0.260
          # incremental time: 0.0224
          # regular time: 0.278
          # incremental time: 0.00804
          # regular time: 0.208
          # incremental time: 0.00947
          # regular time: 0.188
  
          assert set(test_cc.items()) == set(real_cc.items())
  
          prev_cc = test_cc
  
file_path: networkx/networkx/algorithms/centrality/tests/test_closeness_centrality.py
imports: import pytest
  import networkx
label_desc: Use image node_id 16 for calling the TestClosenessCentrality obj's underlying member method code with example usage: obj.test_incremental() without return types