guava/src/com/google/common/util/concurrent/Futures.java
@Beta
  @Deprecated
  @GwtIncompatible // TODO
  public static <V, X extends Exception> CheckedFuture<V, X> immediateCheckedFuture(
      @Nullable V value) {
    return new ImmediateSuccessfulCheckedFuture<>(value);
  }
@Beta
  @Deprecated
  @GwtIncompatible // TODO
  public static <V, X extends Exception> CheckedFuture<V, X> immediateCheckedFuture(
      @Nullable V value) {
    return new ImmediateSuccessfulCheckedFuture<>(value);
  }
TODO(b/72241893): Remove by 2019-01