}
        };
      }
    },
    NEW_WITH_CAS {
      @Override
      ExecutionListWrapper newExecutionList() {
        return new ExecutionListWrapper() {
          final ExecutionListCAS list = new ExecutionListCAS();

          @Override
          public void add(Runnable runnable, Executor executor) {
            list.add(runnable, executor);
          }

          @Override