try {
javax.xml.ws.Holder<String> portObjectId = convertHolder(objectId);
javax.xml.ws.Holder<Boolean> portContentCopied = new javax.xml.ws.Holder<Boolean>();
javax.xml.ws.Holder<CmisExtensionType> portExtension = convertExtensionHolder(extension);
port.checkOut(repositoryId, portObjectId, portExtension, portContentCopied);
setHolderValue(portObjectId, objectId);
setHolderValue(portContentCopied, contentCopied);
setExtensionValues(portExtension, extension);
} catch (CmisException e) {