VersioningServicePort port = fPortProvider.getVersioningServicePort();
try {
javax.xml.ws.Holder<CmisExtensionType> portExtension = convertExtensionHolder(extension);
port.cancelCheckOut(repositoryId, objectId, portExtension);
setExtensionValues(portExtension, extension);
} catch (CmisException e) {
throw convertException(e);
} catch (Exception e) {