code: def test_balanced_tree_star(self):
      # balanced_tree(r,1) is the r-star
      t = nx.balanced_tree(r=2, h=1)
      assert is_isomorphic(t, nx.star_graph(2))
      t = nx.balanced_tree(r=5, h=1)
      assert is_isomorphic(t, nx.star_graph(5))
      t = nx.balanced_tree(r=10, h=1)
      assert is_isomorphic(t, nx.star_graph(10))
  
imports: import itertools
  import typing
  import pytest
  import networkx
  from networkx.algorithms.isomorphism.isomorph import graph_could_be_isomorphic
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 2 for calling the TestGeneratorClassic obj's underlying member method code with example usage: obj.test_balanced_tree_star() without return types