code: @Override
  	protected StringBuffer doPostProcessBundle(BundleProcessingStatus status, StringBuffer bundleData)
  			throws IOException {
  
  		if (minifier == null) {
  
  			boolean keepLicence = status.getJawrConfig().getBooleanProperty(JAWR_CSS_POSTPROCESSOR_CSSMIN_KEEP_LICENCE,
  					false);
  			this.minifier = new CSSMinifier(keepLicence);
  		}
  
  		try {
  			return minifier.minifyCSS(bundleData);
  		} catch (StackOverflowError e) {
  			throw new Error(
  					"An error occured while processing the bundle '" + status.getCurrentBundle().getName() + "'", e);
  		}
  
  	}
docs: /*
  (non-Javadoc)
  
  @see net.jawr.web.resource.bundle.postprocess.impl.
  AbstractChainedResourceBundlePostProcessor#doPostProcessBundle(net.jawr.
  web.resource.bundle.postprocess.BundleProcessingStatus,
  java.lang.StringBuffer)