Function cpt::cpt

pub fn cpt<K, V, S>(
    from: String, 
    to: String, 
    data: HashMap<K, V, S>
) -> Result<(), Box<dyn Error>> where
    K: Hash + Eq + DeserializeOwned + Serialize + Debug,
    V: Hash + Eq + DeserializeOwned + Serialize + Debug + Into<StringOrVecString>,
    S: BuildHasher + Default + Debug,