presto-main/src/main/java/io/prestosql/operator/aggregation/arrayagg/ArrayAggregationStateSerializer.java/ArrayAggregationStateSerializer/ArrayAggregationStateSerializer
class ArrayAggregationStateSerializer:    public ArrayAggregationStateSerializer(Type elementType)
    {
        this.elementType = elementType;
        this.arrayType = new ArrayType(elementType);
    }