code: def test_shell():
      # seeds = [2057382236, 3331169846, 1840105863, 476020778, 2247498425]
      seeds = [20]
      for seed in seeds:
          constructor = [(12, 70, 0.8), (15, 40, 0.6)]
          G = nx.random_shell_graph(constructor, seed=seed)
          _check_edge_connectivity(G)
  
imports: import itertools
  import pytest
  import networkx
  from networkx.algorithms.connectivity import EdgeComponentAuxGraph, bridge_components
  from networkx.algorithms.connectivity.edge_kcomponents import general_k_edge_subgraphs
  from networkx.utils import pairwise
label_desc: Use image node_id 13 for calling a global function with example usage: test_shell() without return types