public static TrainingStatistics undefined() {
return new TrainingStatistics(Maybe.<Map<SentenceKey, EnsembleStatistics>>Nothing());
}
public SentenceStatistics(Counter<String> relationDistribution) {
this.confidence = Maybe.Nothing();
this.relationDistribution = relationDistribution;
}
public Maybe<Set<SentenceKey>> getSentenceKeys() {
if (!impl.isDefined()) return Maybe.Nothing();
return Maybe.Just(impl.get().keySet());
}