presto-rcfile/src/main/java/io/prestosql/rcfile/text/ListEncoding.java/ListEncoding/decodeElementValueInto
class ListEncoding:    private void decodeElementValueInto(int depth, BlockBuilder blockBuilder, Slice slice, int offset, int length)
            throws RcFileCorruptionException
    {
        if (nullSequence.equals(0, nullSequence.length(), slice, offset, length)) {
            blockBuilder.appendNull();
        }
        else {
            elementEncoding.decodeValueInto(depth + 1, blockBuilder, slice, offset, length);
        }
    }