There is not parent
construct specifically, so it is up to you to somehow call the parent constructor.
inherits
adds a super_
property to it's first argument
Users.super_ = Groups;
so you can call the parent constructor like this:
Users.super_.call(this); // Can pass arguments to function as more params.
// OR
Users.super_.apply(this, arguments); // Pass all arguments through.
or you can also reference the parent constructor directly:
Groups.call(this); // Can pass arguments to function as more params.
// OR
Groups.apply(this, arguments); // Pass all arguments through.