code: @Override
  	public void setBundleDataHashCode(String variantKey, String bundleDataHashCode) {
  
  		String prefix = bundleDataHashCode;
  
  		if (StringUtils.isEmpty(variantKey)) {
  			this.urlPrefix = prefix;
  		} else {
  			prefixMap.put(variantKey, prefix);
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see
  net.jawr.web.resource.bundle.JoinableResourceBundle#setBundleDataHashCode
  (java.lang.String, java.lang.String)