* @param hash_func an optional hash function
* @param equal_func an optional equality testing function
*/
- public HashSet (owned HashDataFunc? hash_func = null, owned EqualDataFunc? equal_func = null) {
+ public HashSet (owned HashDataFunc<G>? hash_func = null, owned EqualDataFunc<G>? equal_func = null) {
if (hash_func == null) {
hash_func = Functions.get_hash_func_for (typeof (G));
}