docs: @Nonnull
    public HCConversionSettings setCSSWriterSettings (@Nonnull final ICSSWriterSettings aCSSWriterSettings)
    {
      ValueEnforcer.notNull (aCSSWriterSettings, "CSSWriterSettings");
  
      m_aCSSWriterSettings = new CSSWriterSettings (aCSSWriterSettings);
      return this;
    }