pub trait ToHashMap<T, K, V, FK, FV>{
// Required method
fn to_hash_map(self, key_func: FK, value_func: FV) -> HashMap<K, V>;
}pub trait ToHashMap<T, K, V, FK, FV>{
// Required method
fn to_hash_map(self, key_func: FK, value_func: FV) -> HashMap<K, V>;
}