void throwIt(Throwable t) throws T {
        throw (T) t;
      }
    }
    new SneakyThrower<Error>().throwIt(t);
  }

  public void testTrustedGetFailure_completed() {
    SettableFuture<String> future = SettableFuture.create();
    future.set("261");
    assertThat(future.tryInternalFastPathGetFailure()).isNull();
  }