presto-spi/src/main/java/io/prestosql/spi/block/LazyBlock.java/LazyBlock/retainedBytesForEachPart
class LazyBlock:    @Override
    public void retainedBytesForEachPart(BiConsumer<Object, Long> consumer)
    {
        getBlock().retainedBytesForEachPart(consumer);
        consumer.accept(this, (long) INSTANCE_SIZE);
    }