org.sonatype.nexus.configuration.model.v2_5_0.Configuration oldc =
(org.sonatype.nexus.configuration.model.v2_5_0.Configuration) message.getConfiguration();
BasicVersionUpgrade versionConverter = new BasicVersionUpgrade();
Configuration newc = versionConverter.upgradeConfiguration(oldc);
newc.setVersion(Configuration.MODEL_VERSION);
upgradeEmptyTrashTaskConfiguration(newc);
updateSmtpSslTlsSettings(newc);