Function train_fastcover_raw_from_slice 

pub fn train_fastcover_raw_from_slice(
    sample: &[u8],
    dict_size: usize,
    options: &FastCoverOptions,
) -> Result<(Vec<u8>, FastCoverTuned)>

Available on crate feature dict_builder only.

Train a raw FastCOVER dictionary directly from an in-memory sample.