presto-spi/src/main/java/io/prestosql/spi/block/ArrayBlock.java/ArrayBlock/getLoadedBlock
class ArrayBlock:    @Override
    public Block getLoadedBlock()
    {
        Block loadedValuesBlock = values.getLoadedBlock();

        if (loadedValuesBlock == values) {
            return this;
        }
        return createArrayBlockInternal(
                arrayOffset,
                positionCount,
                valueIsNull,
                offsets,
                loadedValuesBlock);
    }