presto-ml/src/main/java/io/prestosql/plugin/ml/EvaluateClassifierPredictionsStateFactory.java/EvaluateClassifierPredictionsStateFactory/ensureCapacity
class EvaluateClassifierPredictionsStateFactory:        @Override
        public void ensureCapacity(long size)
        {
            truePositives.ensureCapacity(size);
            falsePositives.ensureCapacity(size);
            falseNegatives.ensureCapacity(size);
        }