pub fn from_bytes_stream<I, H>(seq_iter: I, build_hasher: &H) -> Self
    where
        I: Iterator<Item=u8>,
        H: BuildHasher,
{
    let mut dict = HashSet::new();
    let mut hasher = build_hasher.build_hasher();

    for byte in seq_iter {
        hasher.write_u8(byte);
        let hash = hasher.finish() as i32;
        if dict.insert(hash) {
            hasher = build_hasher.build_hasher();
        }
    }

    let mut dict: Vec<_> = dict.iter().cloned().collect();
    dict.sort();

    LZDict { entries: dict.iter().cloned().take(1000).collect() }
}