/// Different custom error messages.
    #[error]
    const ENameNotFound: vector<u8> = b"Name not found.";
    #[error]
    const ENameNotPointingToAddress: vector<u8> = b"Name not pointing to an address.";
    #[error]
    const ENameExpired: vector<u8> = b"Name expired.";
 
    /// A function to transfer an object of any type T to a name (for instance `example.iota`)
    public fun send_to_name<T: key + store>(iota_names: &IotaNames, obj: T, name: String, clock: &Clock) {
        // Look up the name on the registry.
        let mut optional = iota_names.registry<Registry>().lookup(name::new(name));
        // Check that the name indeed exists.
        assert!(optional.is_some(), ENameNotFound);
 
        let name_record = optional.extract();
        // Check that name has not expired. 
        // This check is optional, but it's recommended you perform the verification.
        assert!(!name_record.has_expired(clock), ENameExpired);
        // Check that the name has a target address set.
        assert!(name_record.target_address().is_some(), ENameNotPointingToAddress);
 
        // Transfer the object to that name.
        transfer::public_transfer(obj, name_record.target_address().extract())
    }