// corresponds to a constant value.
  ValuePortResultMap results_;

  // Map from a function to the callers of that function.
  SymbolTableCollection symbol_table_;
  SymbolUserMap symbol_users_;

  // Queue of functions being processed.
  llvm::DenseSet<func::FuncOp> queue_set_;
  std::queue<func::FuncOp> queue_;

  int64_t graph_version_;

      return failure();

    do {
      SymbolUserMap symbol_users(symbol_table_collection, module);

      made_changes = false;
      for (auto func :
           llvm::make_early_inc_range(module.getOps<func::FuncOp>())) {
        ArrayRef<Operation *> users = symbol_users.getUsers(func);
        if (users.size() <= 1) {
          continue;
        }

    //
    // func.func @f(...) -> ... {
    //     yield %x : foo
    // }
    // ...
    // func.call f(...) -> foo
    auto symbol_uses = f.getSymbolUses(f->getParentOp());
    if (!symbol_uses.has_value()) {
      return failure();
    }
    for (auto use : *symbol_uses) {
      Operation* caller = use.getUser();
      bool changed = false;
      rewriter.startOpModification(caller);

                 func.getName();
        });
  };

  auto symbol_uses = SymbolTable::getSymbolUses(&module.getBodyRegion());
  if (!symbol_uses.has_value()) {
    return module.emitError() << "modules with 'tf_saved_model.semantics' must "
                                 "have analyzable symbol uses";
  }
  for (auto symbol_use : *symbol_uses) {
    auto func = symbol_table.lookupNearestSymbolFrom<func::FuncOp>(