code: def setup_method(self):
      G = nx.DiGraph()
      G.add_edge("x", "a", capacity=3.0)
      G.add_edge("x", "b", capacity=1.0)
      G.add_edge("a", "c", capacity=3.0)
      G.add_edge("b", "c", capacity=5.0)
      G.add_edge("b", "d", capacity=4.0)
      G.add_edge("d", "e", capacity=2.0)
      G.add_edge("c", "y", capacity=2.0)
      G.add_edge("e", "y", capacity=3.0)
      self.G = G
      H = nx.DiGraph()
      H.add_edge(0, 1, capacity=1.0)
      H.add_edge(1, 2, capacity=1.0)
      self.H = H
  
imports: import pytest
  import networkx
  from networkx.algorithms.flow import boykov_kolmogorov, build_flow_dict, build_residual_network, dinitz, edmonds_karp, preflow_push, shortest_augmenting_path
label_desc: Use image node_id 1 for calling the TestMaxFlowMinCutInterface obj's underlying member method code with example usage: obj.setup_method() without return types