text: /*
   * Copyright (c) 2014-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  namespace nsa {
  namespace nsb {
  int a;
  }
  } // namespace nsa
  using namespace nsa::nsb;
  namespace B = nsa::nsb;
  int b = a;
  