presto-main/src/main/java/io/prestosql/operator/aggregation/builder/InMemoryHashAggregationBuilder.java/InMemoryHashAggregationBuilder/getSizeInMemory
class InMemoryHashAggregationBuilder:    public long getSizeInMemory()
    {
        long sizeInMemory = groupByHash.getEstimatedSize();
        for (Aggregator aggregator : aggregators) {
            sizeInMemory += aggregator.getEstimatedSize();
        }

        updateIsFull(sizeInMemory);
        return sizeInMemory;
    }