public ConditionalProbabilityStore getExtendedConditionalProbabilities(double distance) {
   return base_.getExtendedConditionalProbabilities(distance, model_, true);
 }
 public Leaf getCopy() {
   return new LeafImpl(base_.getCopy(), model_);
 }
 public ConditionalProbabilityStore getFlatConditionalProbabilities() {
   return base_.getFlatConditionalProbabilities();
 }