code: @Nonnull
    public static String getCompressedCSS (@Nonnull final String sOriginalCSS,
                                           @Nonnull final ECSSVersion eCSSVersion,
                                           final boolean bRemoveUnnecessaryCode)
    {
      final CSSWriterSettings aSettings = new CSSWriterSettings (eCSSVersion, true);
      aSettings.setRemoveUnnecessaryCode (bRemoveUnnecessaryCode);
      return getRewrittenCSS (sOriginalCSS, aSettings);
    }
docs: Get the compressed version of the passed CSS code.
  
  @param sOriginalCSS
  The original CSS code to be compressed.
  @param eCSSVersion
  The CSS version to use.
  @param bRemoveUnnecessaryCode
  if <code>true</code> unnecessary empty declarations are omitted
  @return If compression failed because the CSS is invalid or whatsoever, the
  original CSS is returned, else the compressed version is returned.