code: private boolean containsDataUsageExtension(XLog log) {
  		for (XExtension extension : log.getExtensions()) {
  			if (extension.getName().equals("AttributeDataUsage"))
  				return true;
  		}
  		return false;
  	}
docs: Checks if the extension list contains the {@link XExtension} with the name <i>AttributeDataUsage</i>.