code: def test_barbell():
      G = nx.barbell_graph(5, 0)
      _check_augmentations(G)
  
      G = nx.barbell_graph(5, 2)
      _check_augmentations(G)
  
      G = nx.barbell_graph(5, 3)
      _check_augmentations(G)
  
      G = nx.barbell_graph(5, 4)
      _check_augmentations(G)
  
imports: import itertools
  import random
  import pytest
  import networkx
  from networkx.algorithms.connectivity import k_edge_augmentation
  from networkx.algorithms.connectivity.edge_augmentation import _unpack_available_edges, collapse, complement_edges, is_k_edge_connected, is_locally_k_edge_connected
  from networkx.utils import pairwise
label_desc: Use image node_id 19 for calling a global function with example usage: test_barbell() without return types