complementary naive bayes classifier

[qiaoresearcher]

Does mahout have complementary naive bayes implementation available?
I checked the mahout source code, it seems the author did not finish it
yet? as shown in the following, the thetaSummer job is not submitted.

public final class TrainNaiveBayesJob extends AbstractJob {

....

thetaSummer.getConfiguration().setBoolean(ThetaMapper.TRAIN_COMPLEMENTARY,
trainComplementary);
/* TODO(robinanil): Enable this when thetanormalization works.
    succeeded = thetaSummer.waitForCompletion(true);
    if (!succeeded) {
      return -1;
    }*/

.....

}

Any comments will be appreciated.