public StopReceivingResult Append(StopReceivingResult result) =>
_exceptions.Match(
some: exceptions =>
new StopReceivingResult(
result._exceptions
.Match(
some: rExceptions => exceptions.AddRange(rExceptions),
none: () => exceptions)),
none: () => result);
public static StopReceivingResult Append(this StopReceivingResult self, Either <Exception, Unit> next) => self.Append(new StopReceivingResult(next));