private void parseUnsafe(final XMLExtendedStreamReader reader, final ConfigurationBuilderHolder holder) throws XMLStreamException {
ConfigurationBuilder builder = holder.getCurrentConfigurationBuilder();
for (int i = 0; i < reader.getAttributeCount(); i++) {
ParseUtils.requireNoNamespaceAttribute(reader, i);
String value = replaceProperties(reader.getAttributeValue(i));
Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
switch (attribute) {
case UNRELIABLE_RETURN_VALUES:
builder.unsafe().unreliableReturnValues(Boolean.parseBoolean(value));
break;
default: