}
    return getDoneValue(localValue);
  }

  /** Unboxes {@code obj}. Assumes that obj is not {@code null} or a {@link DelegatingToFuture}. */
  @ParametricNullness
  @SuppressWarnings("TypeParameterUnusedInFormals") // sorry not sorry
  static <V extends @Nullable Object> V getDoneValue(Object obj) throws ExecutionException {
    // While this seems like it might be too branch-y, simple benchmarking proves it to be