future2 = null;
    // No references to list or other output future, second future should be unreferenced
    GcFinalization.awaitClear(future2Ref);
    outputFuture1.get();
  }

  // Mostly an example of how it would look like to use a list of mixed types
  @J2ktIncompatible // Wildcard generics
  public void testCompletionOrderMixedBagOTypes() throws Exception {
    SettableFuture<Long> future1 = SettableFuture.create();

    future2 = null;
    // No references to list or other output future, second future should be unreferenced
    GcFinalization.awaitClear(future2Ref);
    outputFuture1.get();
  }

  // Mostly an example of how it would look like to use a list of mixed types
  @J2ktIncompatible // Wildcard generics
  public void testCompletionOrderMixedBagOTypes() throws Exception {
    SettableFuture<Long> future1 = SettableFuture.create();