code: public double recall(int classLabel, double edgeCase) {
          double tpCount = truePositives.getCount(classLabel);
          double fnCount = falseNegatives.getCount(classLabel);
  
          return EvaluationUtils.recall((long) tpCount, (long) fnCount, edgeCase);
      }
docs: Returns the recall for a given label
  
  @param classLabel the label
  @param edgeCase   What to output in case of 0/0
  @return Recall rate as a double