presto-main/src/main/java/io/prestosql/operator/aggregation/AggregationImplementation.java/AggregationImplementation/AggregateNativeContainerType
class AggregationImplementation:        public AggregateNativeContainerType(Class<?> javaType, boolean isBlockPosition)
        {
            this.javaType = javaType;
            this.isBlockPosition = isBlockPosition;
        }