docs: @Nonnull
    public static EChange setDebugModeEnabled (final boolean bDebugModeEnabled)
    {
      return s_aRWLock.writeLocked ( () -> {
        if (s_bDebugModeEnabled == bDebugModeEnabled)
          return EChange.UNCHANGED;
        s_bDebugModeEnabled = bDebugModeEnabled;
        LOGGER.info ("CompressFilter debugMode=" + bDebugModeEnabled);
        return EChange.CHANGED;
      });
    }