code: @Nonnull
    public static ServletAsyncSpec createAsyncDefault ()
    {
      return createAsync (GlobalDebug.isDebugMode () ? 999_999 * CGlobal.MILLISECONDS_PER_SECOND
                                                     : 30 * CGlobal.MILLISECONDS_PER_SECOND,
                          null);
    }
docs: Create an async spec with 999999 (debug mode) or 30 (production) seconds
  timeout and no async listeners.
  
  @return A new {@link ServletAsyncSpec} and never <code>null</code>.