public @Nullable Void call() throws Exception {
            assertEquals(Thread.currentThread().getName(), newName.get());
            return null;
          }
        };
    Callables.threadRenaming(callable, newName).call();
    assertEquals(oldName, Thread.currentThread().getName());
  }

  @J2ktIncompatible
  @GwtIncompatible // threads
  public void testRenaming_exceptionalReturn() throws Exception {

      @Override
      protected <T extends @Nullable Object> Callable<T> wrapTask(Callable<T> callable) {
        return threadRenaming(callable, nameSupplier);
      }

      @Override
      protected Runnable wrapTask(Runnable command) {
        return threadRenaming(command, nameSupplier);
      }
    };
  }

  /**