// which prevents us having to do this.
if (config.getCssVersion() == null) {
// assume the most common case for test cases for now.
DefaultCSSVersion cssVersion =
new ManualCSS2VersionFactory().createCSSVersion();
cssVersion.markImmutable();
config.setCssVersion(cssVersion);
if (logger.isDebugEnabled()) {
logger.debug("Using testing base CSS Version: " +