let n = 90;
	let result = fib::fib_iter(n).unwrap();
  println!("Fib: {result}");

    let n = 90;
    let result = fib::fib_iter(n).unwrap();
    println!("Fib: {result}");

			let current = self.current;
			self.current = self.next;
			self.next += current;

        let current = self.current;
        self.current = self.next;
        self.next += current;

			Some(current)

        Some(current)

	FibIter::default().nth(n)
}

    FibIter::default().nth(n)
}