code: @Override
      public int equivalence() {
          ProtoNodeTable pnt = network.getProtoNodeTable();
          ProtoEdgeTable pet = network.getProtoEdgeTable();
  
          List<TableProtoEdge> edges = pet.getProtoEdges();
          Map<Integer, Set<Integer>> edgeStmts = pet.getEdgeStatements();
          Map<Integer, Integer> eqn = pnt.getEquivalences();
          Map<Integer, Integer> eqe = pet.getEquivalences();
  
          return equivalenceInternal(edges, edgeStmts, eqn, eqe);
      }
docs: {@inheritDoc}