presto-spi/src/main/java/io/prestosql/spi/block/LazyBlock.java/LazyBlock/listenForLoads
class LazyBlock:    public static void listenForLoads(Block block, Consumer<Block> listener)
    {
        requireNonNull(block, "block is null");
        requireNonNull(listener, "listener is null");

        LazyData.addListenersRecursive(block, singletonList(listener));
    }