private PackageItem handlePackageItem(AssetItem item,
RuleAsset asset) throws SerializationException {
PackageItem packageItem = item.getPackage();
ContentHandler handler = ContentManager.getHandler(asset.getFormat());
handler.retrieveAssetContent(asset,
item);
asset.setReadonly(asset.getMetaData().isHasSucceedingVersion());
if (packageItem.isSnapshot()) {