docstr: Group betweenness centrality for single node group
docstr_tok: ["Group","betweenness","centrality","for","single","node","group"]
code: def test_group_betweenness_with_endpoints(self):
      """
      Group betweenness centrality for single node group
      """
      G = nx.path_graph(5)
      C = [1]
      b = nx.group_betweenness_centrality(
          G, C, weight=None, normalized=False, endpoints=True
      )
      b_answer = 7.0
      assert b == b_answer
  
imports: import pytest
  import networkx
label_desc: Use image node_id 2 for calling the TestGroupBetweennessCentrality obj's underlying member method code with example usage: obj.test_group_betweenness_with_endpoints() without return types