presto-main/src/main/java/io/prestosql/operator/HashAggregationOperator.java/HashAggregationOperator/finishMemoryRevoke
class HashAggregationOperator:    @Override
    public void finishMemoryRevoke()
    {
        if (aggregationBuilder != null) {
            aggregationBuilder.finishMemoryRevoke();
        }
    }