DavPropertyName removeName = (DavPropertyName) entry;
if (propElement == null || isSet) {
isSet = false;
propElement = getPropElement(propUpdateElement, isSet);
}
propElement.appendChild(removeName.toXml(document));
propertyNames.add(removeName);
} else if (entry instanceof DavProperty) {
// DAV:set
DavProperty<?> setProperty = (DavProperty<?>) entry;
if (propElement == null || !isSet) {