TestCheckpointJob.java

public class TestCheckpointJob {

    public static void main(String[] args) throws Exception {
      bootstrapConfig();
      //Rest same as previous code
    }
}

static void bootstrapConfig() throws IOException {
        ExecutionEnvironment executionEnvironment = ExecutionEnvironment.getExecutionEnvironment();
        ExistingSavepoint existingSavepoint = Savepoint.load(executionEnvironment, "oldSavepointPath", new MemoryStateBackend());
        BootstrapTransformation<TestConfig> configTransformation = getConfigTransformation(executionEnvironment);
        String newSavepointPath = "newSavepointPath";
        existingSavepoint.withOperator("classify_data", configTransformation).write(newSavepointPath);
}