private BackupStatus performBackup(final String targetDirPath, final String baselineDirPath) {
    return new BackupOperation(getCache().getDistributionManager(), getCache())
        .backupAllMembers(targetDirPath, baselineDirPath);
  }
Verifies that a user deployed jar file is included as part of the backup.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/backup/IncrementalBackupIntegrationTest.java