Don't require the `--structure` argument.
{
        seed = hash(seed);
    }
};
struct MarkovModelParameters
{
    size_t order;
    size_t frequency_cutoff;
    size_t num_buckets_cutoff;
    size_t frequency_add;
    double frequency_desaturate;
    size_t determinator_sliding_window_size;
    void serialize(WriteBuffer & out) const