presto-main/src/main/java/io/prestosql/operator/aggregation/arrayagg/GroupArrayAggregationState.java/GroupArrayAggregationState/accept
class GroupArrayAggregationState:    @Override
    protected final void accept(ArrayAggregationStateConsumer consumer, PageBuilder pageBuilder, int currentPosition)
    {
        consumer.accept(pageBuilder.getBlockBuilder(VALUE_CHANNEL), currentPosition);
    }