private static string GetNickname([CanBeNull] Delegate dgate, [CanBeNull] IResolveConstraint constraint, [CanBeNull] PrettificationSettings settings) { var dName = dgate?.Prettify(settings); var cName = constraint?.Prettify(settings); var parts = new[] { dName, cName }; return(parts.NonBlank().JoinString(" 🗜 ")); }