* We should annotate the superclass, InternalFutureFailureAccess, to say that its copy of this
   * method returns @Nullable, too. However, we're not sure if we want to make any changes to that
   * class, since it's in a separate artifact that we planned to release only a single version of.
   */
  @CheckForNull
  protected final Throwable tryInternalFastPathGetFailure() {
    if (this instanceof Trusted) {
      Object obj = value;