presto-main/src/main/java/io/prestosql/operator/aggregation/builder/InMemoryHashAggregationBuilder.java/InMemoryHashAggregationBuilder/recordHashCollisions
class InMemoryHashAggregationBuilder:    @Override
    public void recordHashCollisions(HashCollisionsCounter hashCollisionsCounter)
    {
        hashCollisionsCounter.recordHashCollision(groupByHash.getHashCollisions(), groupByHash.getExpectedHashCollisions());
    }