code: @Override
  	public Properties doReadConfig() {
  		Properties baseConfig = super.doReadConfig();
  		ConfigPropertiesAugmenter augmenter;
  		if (null == privateConfigProperties)
  			augmenter = new ConfigPropertiesAugmenter(baseConfig);
  		else
  			augmenter = new ConfigPropertiesAugmenter(baseConfig, privateConfigProperties);
  
  		for (String nextConfigSource : propertyBaseNames) {
  			Properties additionalConfig = readConfigFile(nextConfigSource);
  			augmenter.augmentConfiguration(additionalConfig);
  		}
  
  		return baseConfig;
  	}
docs: /*
  (non-Javadoc)
  
  @see net.jawr.web.resource.bundle.factory.util.ConfigPropertiesSource#
  getConfigProperties()