class AbstractManagedChannelImplBuilder extends ManagedChannelBuilder<T> {

  @Override
  public final T executor(Executor executor) {
    if (executor != null) {
      this.executorPool = new FixedObjectPool<Executor>(executor);
    } else {
      this.executorPool = DEFAULT_EXECUTOR_POOL;
    }
    return thisT();
  }

  protected  AbstractManagedChannelImplBuilder(String target);
  protected  AbstractManagedChannelImplBuilder(SocketAddress directServerAddress, String authority);

}