public class UsingDelegates : MonoBehaviour
{
    private List<Unicorn> unicorns = new List<Unicorn>();
    Vector3 playerPosition;

    static Func<Unicorn, Vector3, bool> isCloseTo = (Unicorn unicorn, Vector3 position) => (position - unicorn.transform.position).magnitude > 5f;

    void Update()
    {
        unicorns.ForEach(@if: isCloseTo, then: Unicorn.GiveHug, arg1: playerPosition);
    }
}