public ClassDescriptor buildSessionConfigsDescriptor() {
XMLDescriptor descriptor = new XMLDescriptor();
descriptor.setDefaultRootElement("sessions");
descriptor.setJavaClass(SessionConfigs.class);
descriptor.setSchemaReference(new XMLSchemaClassPathReference(ECLIPSELINK_SESSIONS_SCHEMA));
XMLDirectMapping versionMapping = new XMLDirectMapping();
versionMapping.setAttributeName("m_version");
versionMapping.setGetMethodName("getVersion");
versionMapping.setSetMethodName("setVersion");